SCHEDULE 14A INFORMATION

          PROXY STATEMENT PURSUANT TO SECTION 14(a) OF THE SECURITIES
                   EXCHANGE ACT OF 1934 (AMENDMENT NO.      )

Filed by the Registrant [X]
Filed by a Party other than the Registrant [ ]

Check the appropriate box:

[X]  Preliminary Proxy Statement [ ] Confidential, for Use of the
                                     Commission only (as permitted by Rule
                                     14a-6(e)(2))
[ ] Definitive Proxy Statement
[ ] Definitive Additional Materials
[ ] Soliciting Material Pursuant to Rule 14a-11(c) or Rule 14a-12

                         VAN KAMPEN SENIOR INCOME TRUST

                (Name of Registrant as Specified in Its Charter)

Payment of Filing Fee (Check the appropriate box):

[X] No fee required.

[ ] Fee computed per Exchange Act Rules 14a-6(i)(1) and 0-11.

[ ] Fee paid previously with preliminary materials.


                            --  JANUARY   , 2004  --
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                                IMPORTANT NOTICE
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--------------------------------------------------------------------------------
                                 TO VAN KAMPEN
                        SENIOR INCOME TRUST SHAREHOLDERS
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                                                             QUESTIONS & ANSWERS

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   Although we recommend that you read the complete Proxy Statement, for your
  convenience, we have provided a brief overview of the issues to be voted on.
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Q      WHY IS A SHAREHOLDER MEETING BEING HELD?

A      The primary purpose of the
special meeting of shareholders of Van Kampen Senior Income Trust is to seek the
approval of shareholders to amend a fundamental investment restriction of the
Fund.

Q      WHAT PROPOSAL WILL BE VOTED ON?

A      You are being asked to
vote on a proposal to amend the Fund's fundamental investment restriction
regarding the Fund's use of financial leverage to allow the Fund to use leverage
to the maximum extent allowable under the Investment Company Act of 1940. Please
refer to the proxy statement for a detailed explanation of the proposal.

Q      HOW DOES THE BOARD OF TRUSTEES RECOMMEND THAT I VOTE?

A      After careful consideration,
the Board of Trustees recommends that you vote "FOR" the proposal on the
enclosed proxy card.

Q      WILL MY VOTE MAKE A DIFFERENCE?

A      Yes, your vote is important
and will make a difference no matter how many shares you own. We encourage all
shareholders to participate in the governance of their funds.

Q      WHERE DO I CALL FOR MORE INFORMATION?

A      Please call Van Kampen's
Client Relations Department at 1-800-341-2929 (Telecommunications Device for the
Deaf users may call 1-800-421-2833) or visit our website at www.vankampen.com,
where you can send us an e-mail message by selecting "Contact Us."


                              ABOUT THE PROXY CARD
--------------------------------------------------------------------------------

Please vote using blue or black ink to mark an X in one of the boxes provided on
the proxy card.

Sign, date and return the proxy card in the enclosed postage-paid envelope. All
registered owners of an account, as shown in the address, must sign the card.
When signing as attorney, trustee, executor, administrator, custodian, guardian
or corporate officer, please indicate your full title.


  

[X ] PLEASE MARK
     VOTES AS IN
     THIS EXAMPLE


                         VAN KAMPEN SENIOR INCOME TRUST
                        SPECIAL MEETING OF SHAREHOLDERS
               PROXY SOLICITED ON BEHALF OF THE BOARD OF TRUSTEES
           XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
           XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
             XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

                         VAN KAMPEN SENIOR INCOME TRUST
                        SPECIAL MEETING OF SHAREHOLDERS



                          FOR   AGAINST   ABSTAIN
                                       
1.   The Proposal to      [ ]     [ ]       [ ]
     amend the Fund's
     fundamental
     investment
     restriction
     regarding the
     Fund's use of
     financial leverage.
     ----------------------------------
2.   To transact such other business as may
     properly come before the Meeting.


Please be sure to sign and date this Proxy. Date

Shareholder sign here       Co-owner sign here

             XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
                                     SAMPLE


                         VAN KAMPEN SENIOR INCOME TRUST

                                1 PARKVIEW PLAZA
                     OAKBROOK TERRACE, ILLINOIS 60181-5555
                            TELEPHONE (800) 341-2929

                   NOTICE OF SPECIAL MEETING OF SHAREHOLDERS

                          TO BE HELD MARCH [  ], 2004

  Notice is hereby given to the shareholders of Van Kampen Senior Income Trust
(the "Fund") that a Special Meeting of Shareholders of the Fund (the "Meeting")
will be held at the offices of Van Kampen Investments Inc., 1 Parkview Plaza,
Oakbrook Terrace, Illinois 60181-5555, on [      ], March [  ], 2004, at
[      ] , for the following purposes:


  
1.   To approve the proposal to amend the fundamental investment
     restriction regarding the Fund's use of financial leverage
     to allow the Fund to utilize financial leverage to the
     maximum extent allowable under the Investment Company Act of
     1940, as amended.
2.   To transact such other business as may properly come before
     the Meeting or any adjournments thereof.


  Shareholders of record at the close of business on [         ], 2004, are
entitled to notice of and to vote at the Meeting and any adjournment thereof.

                                    By order of the Board of Trustees,

                                    A. THOMAS SMITH III
                                    Vice President and Secretary
[         ], 2004

  THE FUND WILL FURNISH, WITHOUT CHARGE, A COPY OF ITS MOST RECENT ANNUAL REPORT
TO ANY SHAREHOLDER UPON REQUEST. ANY SUCH REQUEST SHOULD BE DIRECTED TO THE FUND
BY CALLING 1-800-341-2929 (TDD USERS MAY CALL 1-800-421-2833) OR BY WRITING TO
THE FUND AT 1 PARKVIEW PLAZA, P.O. BOX 5555, OAKBROOK TERRACE, ILLINOIS
60181-5555.

  SHAREHOLDERS OF THE FUND ARE INVITED TO ATTEND THE MEETING IN PERSON. IF YOU
DO NOT EXPECT TO ATTEND THE MEETING, PLEASE INDICATE YOUR VOTING INSTRUCTIONS ON
THE ENCLOSED PROXY CARD, DATE AND SIGN THE PROXY CARD AND RETURN IT IN THE
ENVELOPE PROVIDED, WHICH IS ADDRESSED FOR YOUR CONVENIENCE AND NEEDS NO POSTAGE
IF MAILED IN THE UNITED STATES.


  IN ORDER TO AVOID THE ADDITIONAL EXPENSE OF FURTHER SOLICITATION, WE ASK THAT
YOU MAIL YOUR PROXY PROMPTLY.

  The Board of Trustees of the Fund recommends that you cast your vote:

  - FOR approval of the proposal to amend the fundamental investment restriction
    regarding the Fund's use of financial leverage.

                            YOUR VOTE IS IMPORTANT.
                     PLEASE RETURN YOUR PROXY CARD PROMPTLY
                       NO MATTER HOW MANY SHARES YOU OWN.


                                PROXY STATEMENT

                         VAN KAMPEN SENIOR INCOME TRUST

                                1 PARKVIEW PLAZA
                     OAKBROOK TERRACE, ILLINOIS 60181-5555
                            TELEPHONE (800) 341-2929

                        SPECIAL MEETING OF SHAREHOLDERS

                           DATED [           ], 2004

  This Proxy Statement is furnished in connection with the solicitation by the
Board of Trustees (the "Trustees" or the "Board") of Van Kampen Senior Income
Trust (the "Fund") of proxies to be voted at the Special Meeting of Shareholders
of the Fund, and all adjournments thereof (the "Meeting"), to be held at the
offices of Van Kampen Investments Inc., 1 Parkview Plaza, Oakbrook Terrace,
Illinois 60181-5555, on [  ], March [  ], 2004, at [      ]. The approximate
mailing date of this Proxy Statement and accompanying form of proxy is
[         ], 2004.

  Participating in the Meeting are holders of common shares of beneficial
interest (the "Common Shares") of the Fund. The Board has fixed the close of
business on [         ], 2004 as the record date (the "Record Date") for the
determination of holders of Common Shares of the Fund entitled to vote at the
Meeting. At the close of business on [         ], 2004, there were issued and
outstanding       Common Shares of the Fund.

  THE FUND WILL FURNISH, WITHOUT CHARGE, A COPY OF ITS MOST RECENT ANNUAL REPORT
TO ANY SHAREHOLDER UPON REQUEST. ANY SUCH REQUEST SHOULD BE DIRECTED TO THE FUND
BY CALLING 1-800-341-2929 (TDD USERS MAY CALL 1-800-421-2833) OR BY WRITING TO
THE FUND AT 1 PARKVIEW PLAZA, P.O. BOX 5555, OAKBROOK TERRACE, ILLINOIS
60181-5555.

VOTING

  Holders of Common Shares of the Fund (the "Common Shareholders") on the Record
Date are entitled to one vote per Common Share with respect to any proposal
submitted to the Common Shareholders of the Fund, with no Common Share having
cumulative voting rights.

  The Board of Trustees of the Fund recommends that you cast your vote:

  - FOR approval of the proposal to amend the fundamental investment restriction
    regarding the Fund's use of financial leverage.

  All properly executed proxies received prior to the Meeting will be voted at
the Meeting in accordance with the instructions marked thereon. Proxies received
prior


to the Meeting on which no vote is indicated will be voted "FOR" the proposal as
to which they are entitled to be voted. A Common Shareholder who abstains from
voting on any or all matters will be deemed present at the Meeting for quorum
purposes, but will not be deemed to have voted on the particular matter (or
matters) as to which the Common Shareholder has abstained. Similarly, in the
event a nominee (such as a brokerage firm) holding Common Shares for beneficial
owners indicates that instructions have not been received from the beneficial
owners and the nominee does not exercise discretionary authority (a so-called
"broker non-vote"), the Common Shares held by the nominee will be deemed present
at the Meeting for quorum purposes but will not be deemed to have voted on the
particular matter (or matters) as to which the nominee has not voted. A majority
of the outstanding Common Shares must be present in person or by proxy to have a
quorum to conduct business at the Meeting.

  Common Shareholders who execute proxies may revoke them at any time before
they are voted by filing with the Fund a written notice of revocation, by
delivering a duly executed proxy bearing a later date or by attending the
Meeting and voting in person.

  The Fund knows of no business other than the proposal to amend the fundamental
investment restriction of the Fund that will be presented for consideration at
the Meeting. If any other matters are properly presented, it is the intention of
the persons named on the enclosed proxy to vote proxies in accordance with their
best judgment. In the event a quorum is present at the Meeting but sufficient
votes to approve any of the proposals are not received, proxies (including
abstensions and non-votes) would be voted in favor of one or more adjournments
of the Meeting of the Fund to permit further solicitation of proxies provided
they determine that such an adjournment and additional solicitation is
reasonable and in the interest of Common Shareholders based on a consideration
of all relevant factors, including the nature of the relevant proposal, the
percentage of votes then cast, the percentage of negative votes then cast, the
nature of the proposed solicitation activities and the nature of the reasons for
such further solicitation.

INVESTMENT ADVISER

  Van Kampen Asset Management serves as investment adviser to the Fund ("Asset
Management" or the "Adviser"). The principal business address of the Adviser is
1 Parkview Plaza, Oakbrook Terrace, Illinois 60181-5555. The Adviser is a wholly
owned subsidiary of Van Kampen Investments Inc. ("Van Kampen Investments"), an
indirect wholly owned subsidiary of Morgan Stanley. Morgan Stanley is a
preeminent global financial services firm that maintains leading market
positions in each of its three primary businesses: securities, asset management
and credit services. Morgan Stanley is a full service securities firm engaged in
securities trading and brokerage activities, investment banking, research and
analysis,

                                        2


financing and financial advisory services. Van Kampen Investments is one of the
nation's largest investment management companies, with more than $    billion in
assets under management or supervision as of [         ], 2004.

OTHER SERVICE PROVIDERS

  The Fund has entered into an administration agreement and a legal services
agreement with Van Kampen Investments. The principal business address of Van
Kampen Investments is 1 Parkview Plaza, Oakbrook Terrace, Illinois 60181-5555.
The Fund has also entered an accounting services agreement with Asset
Management.

                                        3


PROPOSAL 1  TO AMEND THE FUNDAMENTAL INVESTMENT RESTRICTION REGARDING THE FUND'S
            USE OF FINANCIAL LEVERAGE

  The Fund currently has a fundamental investment restriction that provides that
the Fund shall not:

    Issue senior securities (including borrowing money or entering into reverse
    repurchase agreements) in excess of 33 1/3% of its total assets (including
    the amount of senior securities issued but excluding any liabilities and
    indebtedness not constituting senior securities) except that the Fund may
    borrow up to an additional 5% of its total assets for temporary purposes, or
    pledge its assets other than to secure such issuance or in connection with
    hedging transactions, when-issued and delayed delivery transactions and
    similar investment strategies.

  The Board of Trustees proposes amending the above described fundamental
investment restriction regarding the use of financial leverage by the Fund to
allow the Fund to utilize financial leverage to the maximum extent allowable
under the Investment Company Act of 1940, as amended (the "1940 Act"). The
proposed amended fundamental investment restriction provides that the Fund shall
not:

    Issue senior securities nor borrow money, except that the Fund may issue
    senior securities or borrow money to the extent permitted by (i) the 1940
    Act, (ii) the rules or regulation promulgated by the SEC under the 1940 Act,
    or (iii) an exemption or other relief applicable to the Fund from the
    provisions of the 1940 Act.

  Under the Fund's current investment restriction, the Fund cannot utilize
leverage (whether by borrowing money or issuing preferred shares) greater than
33 1/3% of the Fund's total assets. As described in more detail below, under the
1940 Act a fund generally may not (i) borrow money greater than 33 1/3% of the
fund's total assets or (ii) issue preferred shares greater than 50% of the
fund's total assets. In using a combination of borrowing money and issuing
preferred shares, the maximum allowable leverage is somewhere between 33 1/3%
and 50% (but in no event more than 50%) of the Fund's total assets based on the
relative amounts borrowed or preferred shares issued. Under the Fund's proposed
amended investment restriction, the Fund would be able to utilize financial
leverage to the maximum extent allowable under the 1940 Act. As described below,
Asset Management believes the Fund's current limitation adversely impacts the
Fund's yield and total return and disadvantages the Fund's Common Shareholders
relative to other closed-end senior loan funds that have less restrictive
leverage restrictions.

  Under the 1940 Act, a fund is not permitted to incur indebtedness unless
immediately after such incurrence the fund has an asset coverage of at least
300% of the aggregate outstanding principal balance of the indebtedness (i.e.,
such indebtedness may not exceed 33 1/3% of the fund's total assets).
Additionally, under the 1940 Act, a fund may not declare any dividend or other
distribution upon any
                                        4


class of its capital shares, or purchase any such capital shares, unless the
aggregate indebtedness of the fund has, at the time of the declaration of such
dividend or distribution, or at the time of any such purchase, an asset coverage
of at least 300% after deducting the amount of such dividend, distribution or
purchase price, as the case may be. Under the 1940 Act, a fund is not permitted
to issue preferred shares unless immediately after such issuance the net asset
value of the fund's portfolio is at least 200% of the liquidation value of the
outstanding preferred shares (i.e., such liquidation value may not exceed 50% of
the Fund's total assets). In addition, a fund is not permitted to declare any
cash dividend or other distribution on its common shares unless, at the time of
such distribution, the net asset value of the fund's portfolio (determined after
deducting the amount of such dividend or other distribution) is at least 200% of
such liquidation value.

THE FUND'S USE OF FINANCIAL LEVERAGE

  The Fund currently employs financial leverage through borrowings. The Fund has
entered into a $700 million revolving credit agreement with Corporate
Receivables Corporation and Preferred Receivables Funding Corporation (together
with their permitted successors and assigns, the "Conduit Lenders") and with
Citicorp North America, Inc. and Bank One, NA (together with their permitted
assigns, the "Secondary Lenders") whereby the Conduit Lenders and the Secondary
Lenders from time to time agree to make advances to the Fund on the terms and
subject to the conditions in the revolving credit agreement (the "Credit
Agreement"). Each of the Conduit Lenders has the authority to lend a maximum of
$350 million to the Fund, and a Secondary Lender may lend to the Fund in the
event a related Conduit Lender declines to make advances to the Fund. The Credit
Agreement is secured by the assets of the Fund. For the fiscal year ended July
31, 2003, the average daily balance of borrowings under the Credit Agreements
was $      with a weighted average interest rate of   %. As of          , 2004,
the Fund has $      outstanding under the Credit Agreement, or   % of the Fund's
total assets.

  The Fund has filed a registration statement to issue $700 million of Auction
Rate Cumulative Preferred Shares (the "Preferred Shares"). The Fund expects to
complete the offering of the Preferred Shares in February 2004. The Fund will
use all of the net proceeds of the offering to (i) pay down amounts borrowed by
the Fund under the Commercial Paper Program and (ii) invest the remaining
proceeds in accordance with the Fund's investment objective and policies. The
Preferred Shares will be senior to the Fund's Common Shares. The Preferred
Shares will not be listed on an exchange, but will be bought and sold in
auctions through participating broker-dealers. The Fund will not issue Preferred
Shares unless such shares have a rating of "Aaa" from Moody's Investors Service,
Inc. and "AAA" from Fitch Ratings. The Preferred Shares will pay dividends based
on a rate set at auctions, normally held every seven days. The holders of the
Preferred Shares will

                                        5


vote as a separate class to elect two Trustees of the Fund and will have such
other rights as described in the prospectus of the Preferred Shares.

  Provided that the proposal to amend the fundamental investment restriction
regarding the Fund's use of leverage is approved, the Fund expects that it will,
subject to Asset Management's view of then-current market conditions, increase
the amount of leverage employed by the Fund, in accordance with the requirements
of the 1940 Act, by a combination or maintaining the Preferred Shares and
borrowing under the Credit Agreement.

ACTION AND RECOMMENDATION OF THE BOARD OF TRUSTEES

  At the Fund's inception in 1998, the Fund anticipated borrowing money and/or
issuing preferred shares in order to use the proceeds for investment purposes
(i.e. leverage). The Fund seeks to use leverage to benefit the Fund's Common
Shares. Asset Management and the Fund's Board of Trustees regularly review the
Fund's use of leverage, i.e. the relative costs and benefits of leverage on the
Fund's Common Shares, and review the alternative means to leverage, i.e. the
relative benefits and costs of borrowing versus issuing Preferred Shares. Since
inception, the Fund has leveraged primarily by borrowing money, but as noted
above, the Fund has recently filed a registration statement to issue Preferred
Shares, and anticipates utilizing a combination of Preferred Shares and
borrowing for leverage going forward. As part of the regular review of leverage,
Asset Management and the Fund's Board of Trustees consider the Fund's use of
leverage relative to the Fund's investment restriction on leverage, applicable
legal or regulatory restrictions on leverage and to competitor funds. In part
because of the Fund's current fundamental investment restriction, the Fund has
historically utilized less leverage than other listed closed-end senior loan
funds.

  In connection with meetings of the Board of Trustees of the Fund on the
Preferred Shares, representatives of Asset Management made presentations to the
Board proposing the amendment to the Fund's investment restriction limiting the
Fund's use of leverage. The Board considered information prepared by Asset
Management regarding the potential benefits, costs and risks of amending the
investment restriction. Among the potential benefits discussed were (i) the
increased investment flexibility provided by amending the investment
restriction, (ii) the capability of increased leverage to enhance income and
distributions to holders of Common Shares, (iii) the possible benefits of
additional investment capital in positive market environments, and (iv) a
capital structure more competitive with similar leveraged closed-end senior loan
funds in the marketplace. Asset Management and the Board discussed the Fund's
current limitation on leverage and that each of the other leveraged closed-end
senior loan funds had a leverage ratio higher than that of the Fund. Asset
Management and the Board discussed the potential implications of increased
leverage on yield and total return, as well as the

                                        6


potential impact on the Common Shares premium or discount and Common Share
market liquidity.

  After careful consideration, the Board of Trustees determined that the
approval of this proposal and the ability of the Fund to utilize financial
leverage to the maximum extent allowed by the 1940 Act are in the best interests
of the Fund's Common Shareholders.

RISKS OF FINANCIAL LEVERAGE

  As was disclosed in the prospectus in connection with the initial public
offering of the Common Shares, the issuance of Preferred Shares and the use of
borrowing for investment purposes are forms of financial leverage, and as such
will pose certain risks for Common Shareholders, including the possibility of
higher volatility of the net asset value and market value of, and distributions
paid on, the Common Shares. Increasing the Fund's leverage will magnify such
risks.

  As long as the Fund is able to invest the proceeds of any Preferred Shares
offering or borrowing in securities that provide a higher net return than the
then current dividend rate of the Preferred Shares or interest rate on the
borrowing after taking into account the expenses of the Preferred Shares
offering or borrowing and the Fund's operating expenses, the effect of leverage
will be to cause the Common Shareholders to realize a higher current rate of
return than if the Fund were not leveraged. However, if the current dividend
rate of the Preferred Shares or interest rate on the borrowing were to approach
the return on such proceeds after expenses, the benefit of leverage to Common
Shareholders would be reduced, and if the current dividend rate of the Preferred
Shares or interest rate on the borrowing were to exceed such net return, the
Fund's leveraged capital structure would result in a lower rate of return to the
Common Shareholders than if the Fund had an unleveraged capital structure.
During any annual period when the Fund's net investment income and undistributed
net realized capital gains are insufficient to pay the dividends then due on any
outstanding Preferred Shares, the failure to pay dividends on the Preferred
Shares would preclude the Fund from paying dividends on the Common Shares until
such dividends on the Preferred Shares have been paid or provided for. The terms
of any borrowing may preclude the Fund from paying dividends on the Common
Shares at any time that the Fund is not current in the payment of interest or
repayment of principal on such borrowing. In addition, under the 1940 Act, the
Fund is not permitted to declare any cash dividend or other distribution on its
Common Shares unless, at the time of such declaration and after deducting the
amount of such dividend or distribution, the Fund is in compliance with the
asset coverage requirements of the 1940 Act. Such prohibition on the payment of
dividends or distributions might impair the ability of the Fund to maintain its
qualification, for federal income tax purposes, as a regulated investment
company. The Fund intends, however, to the extent possible to purchase or redeem

                                        7


Preferred Shares or to repay borrowings from time to time if necessary to
maintain compliance with such asset coverage requirements.

  If there are no Preferred Shares issued and outstanding, Common Shareholders
elect all of the Trustees of the Fund. If there are Preferred Shares issued and
outstanding, holders of the Preferred Shares will elect two Trustees. Under the
1940 Act, upon failure by the Fund to pay dividends on the Preferred Shares in
an amount equal to two full years' dividends arrearage, the holders of the
Preferred Shares shall be entitled to elect a majority of the Board of Trustees
until all such dividends arrearage has been paid or provided for. The lenders
with respect to any borrowing by the Fund may be entitled to elect a majority of
the Board of Trustees if certain asset coverage requirements are not maintained.
Failure to maintain asset coverage may also result in a default under the terms
of any borrowing. In addition, the terms of any Preferred Shares or borrowing
may entitle holders of the Preferred Shares or lenders, as the case may be, to
elect a majority of the Board of Trustees in certain other circumstances.

  Because the Fund's use of leverage increases the total assets under
management, the Fund pays a greater amount of advisory fees and administrative
fees when leverage is utilized.

COMMON SHAREHOLDER APPROVAL

  To become effective, the proposed amendment of the Fund's fundamental
investment restrictions must be approved by a vote of a majority of the Fund's
outstanding voting securities as defined by the 1940 Act, which means the lesser
of (i) 67% or more of the voting securities present at a meeting of
shareholders, if the holders of more than 50% of the outstanding voting
securities are present or represented by proxy at such meeting, or (ii) more
than 50% of the outstanding voting securities) of the Fund's outstanding Common
Shares.

  The proposed amendment of the fundamental investment restrictions as described
above was approved by the Board of Trustees of the Fund after consideration of
all the factors they determined to be relevant to their deliberations, including
those discussed above. The Board of Trustees also determined to submit the
proposed amendment of the Fund's fundamental investment restrictions for
consideration to the Fund's Common Shareholders.

  THE BOARD OF TRUSTEES RECOMMENDS A VOTE "FOR" APPROVAL OF THE PROPOSAL TO
AMEND THE FUNDAMENTAL INVESTMENT RESTRICTION REGARDING THE FUND'S USE OF
FINANCIAL LEVERAGE.

                                        8


                            SHAREHOLDER INFORMATION

  At the close of business on [      ], 2004, the record date (the "Record
Date") with respect to the Special Meeting, there were       Common Shares of
the Fund outstanding. As of the Record Date, the directors and officers of the
Fund as a group owned less than 1% of the outstanding Common Shares of the Fund.
As of the Record Date, no person was known by the Fund to own beneficially more
than 5% of the Common Shares of the Fund except as follows:



                SHAREHOLDER AND ADDRESS                     PERCENTAGE OWNERSHIP
                -----------------------                     --------------------
                                                         


SECTION 16(a) BENEFICIAL OWNERSHIP REPORTING COMPLIANCE

  Section 30(f) of the 1940 Act and Section 16(a) of the Securities Exchange Act
of 1934, as amended, require each of the Fund's trustees, officers, investment
adviser, affiliated persons of the investment adviser and persons who own more
than 10% of a registered class of the Fund's equity securities to file forms
with the SEC and the New York Stock Exchange reporting their affiliation with
the Fund and reports of ownership and changes in ownership of Common Shares.
These persons and entities are required by SEC regulation to furnish the Fund
with copies of all such forms they file. Based on a review of these forms
furnished to the Fund, the Fund believes that during its last fiscal year, its
trustees, officers, Asset Management and affiliated persons of Asset Management
complied with the applicable filing requirements.

EXPENSES

  The expenses of preparing, printing and mailing the enclosed form of proxy,
the accompanying Notice and this Proxy Statement and all other costs in
connection with the solicitation of proxies will be borne by the Fund. The Fund
will also reimburse banks, brokers and others for their reasonable expenses in
forwarding proxy solicitation material to the beneficial owners of Common Shares
of the Fund. The Fund has retained ALAMO Direct Mail Services, Inc. ("ALAMO") to
make telephone calls to Common Shareholders to remind them to vote. In addition,
ALAMO and D.F. King & Co., Inc. ("D.F. King"), each a professional proxy
solicitation firm, may also be retained to assist with any necessary
solicitation of proxies. Common Shareholders may receive a telephone call from a
professional proxy solicitation firm asking them to vote. In the event of a
solicitation by ALAMO and/or D.F. King, the solicitor would be paid a project
management fee not to exceed $         as well as fees charged on a per call
basis and certain other expenses. Proxy solicitation expenses will be borne by
the Fund.

                                        9


SHAREHOLDER PROPOSALS

  To be considered for presentation at a shareholders' meeting, rules
promulgated by the SEC generally require that, among other things, a
shareholder's proposal must be received at the offices of the relevant Fund a
reasonable time before a solicitation is made. Shareholder proposals intended to
be presented at the annual meeting of Common Shareholders of the Fund pursuant
to Rule 14a-8 under the Exchange Act of 1934, as amended (the "Exchange Act"),
must have been received by the Fund at the Fund's principal executive offices by
January 24, 2004. In order for proposals made outside of Rule 14a-8 under the
Exchange Act to be considered "timely" within the meaning of Rule 14a-4(c) under
the Exchange Act, such proposals must be received by the Fund at the Fund's
principal executive offices not later than April 14, 2004. Timely submission of
a proposal does not necessarily mean that such proposal will be included. Any
Common Shareholder who wishes to submit a proposal for consideration at a
meeting of the Fund should send such proposal to the Fund at 1 Parkview Plaza,
PO Box 5555, Oakbrook Terrace, Illinois 60181-5555.

GENERAL

  Management of the Fund does not intend to present and does not have reason to
believe that others will present any other items of business at the Meeting.
However, if other matters are properly presented to the Meeting for a vote, the
proxies will be voted upon such matters in accordance with the judgment of the
persons acting under the proxies.

  A list of Common Shareholders of the Fund entitled to be present and vote at
the Meeting will be available at the offices of the Fund, 1 Parkview Plaza,
Oakbrook Terrace, Illinois 60181-5555, for inspection by any Common Shareholder
during regular business hours for ten days prior to the date of the Meeting.

  Failure of a quorum to be present at the Meeting may necessitate adjournment
and may subject the Fund to additional expense.

  IF YOU CANNOT BE PRESENT IN PERSON, YOU ARE REQUESTED TO FILL IN, SIGN AND
RETURN THE ENCLOSED PROXY PROMPTLY. NO POSTAGE IS REQUIRED IF MAILED IN THE
UNITED STATES.

                                       A. THOMAS SMITH III,
                                       Vice President and Secretary

[         ], 2004

                                        10


                         [VAN KAMPEN INVESTMENTS LOGO]

                                                                      VVR 03


           [X] PLEASE MARK
            VOTES AS IN
            THIS EXAMPLE             FORM OF PROXY
                            VAN KAMPEN SENIOR INCOME TRUST

                            SPECIAL MEETING OF SHAREHOLDERS

                  PROXY SOLICITED ON BEHALF OF THE BOARD OF TRUSTEES

           The undersigned holder of Common Shares of VAN KAMPEN SENIOR
           INCOME TRUST, a Massachusetts business trust (the "Fund"), hereby
           appoints A. Thomas Smith III, John L. Sullivan, Lou Anne McInnis
           and Elizabeth A. Nelson and each of them or their respective
           designees, with full power of substitution and revocation, as
           proxies to represent the undersigned at the Special Meeting of
           Shareholders to be held at the offices of Van Kampen Investments
           Inc., 1 Parkview Plaza, Oakbrook Terrace, Illinois 60181-5555, on
           [       ], March [ ], 2004, at [       ], and any and all
           adjournments thereof (the "Meeting"), and thereat to vote all
           Common Shares which the undersigned would be entitled to vote,
           with all powers the undersigned would possess if personally
           present, in accordance with the following instructions.

           Account No.     No. of Shares    Class of Shares    Proxy No.


                                                                                        
                                                                                      FOR  AGAINST  ABSTAIN
                 1.     Authority to vote for the approval of the proposal to amend   [ ]    [ ]      [ ]
                        the fundamental investment restriction regarding the Fund's
                        use of financial leverage.

                        ------------------------------------------------------------

                 2.     To transact such other business as may properly come before
                        the Meeting.


           If more than one of the proxies, or their substitutes, are
           present at the Meeting or any adjournment thereof, they jointly
           (or, if only one is present and voting, then that one) shall have
           authority and may exercise all powers granted hereby. This Proxy,
           when properly executed, will be voted in accordance with the
           instructions marked hereon by the undersigned. IF NO
           SPECIFICATION IS MADE, THIS PROXY WILL BE VOTED "FOR" THE
           PROPOSAL DESCRIBED HEREIN AND, IN THE DISCRETION OF THE PROXIES,
           UPON SUCH OTHER BUSINESS AS MAY PROPERLY COME BEFORE THE MEETING.
           THE UNDERSIGNED HEREBY ACKNOWLEDGES RECEIPT OF THE ACCOMPANYING
           NOTICE OF MEETING AND PROXY STATEMENT FOR THE MEETING TO BE HELD
           ON MARCH [ ], 2004.

                                                Date [ ], 2004

                                                ----------------------------
                                                   Shareholder signature

                                                ----------------------------
                                                   Co-owner signature (if
                                                        applicable)

                                                Please sign this Proxy
                                                exactly as your name or
                                                names appear on the books of
                                                the Fund. When signing as
                                                attorney, trustee, executor,
                                                administrator, custodian,
                                                guardian or corporate
                                                officer, please give full
                                                title. If Common Shares are
                                                held jointly, each holder
                                                must sign.