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                                                               EXHIBIT (a)(1)(f)

                                 FIFTH AMENDMENT
                                       TO
                       AGREEMENT AND DECLARATION OF TRUST
                                       OF
                              AIM INVESTMENT FUNDS

         THIS FIFTH AMENDMENT TO AGREEMENT AND DECLARATION OF TRUST OF AIM
INVESTMENT FUNDS (the "Amendment") is entered into as of the 11th day of
February, 2000, among C. Derek Anderson, Frank S. Bayley, Robert H. Graham and
Ruth H. Quigley, as Trustees, and each person who became or becomes a
Shareholder in accordance with the terms set forth in that certain Agreement and
Declaration of Trust of AIM Investment Funds, a Delaware business trust (the
"Trust"), entered into as of May 7, 1998, as amended (the "Agreement").

         WHEREAS, Sections 2.3 and 9.7 of the Agreement empower the Trustees
without Shareholder action to amend the Agreement in order to change the
designations of the Portfolios and the Classes thereof; and

         WHEREAS, the Trustees on November 3, 1999, acting pursuant to Section
9.3 of the Agreement, approved the termination of the Advisor Classes of the
Portfolios and the conversion of shares of such Advisor Classes into shares of
Class A of the Portfolios;

         NOW, THEREFORE, the Trustees hereby amend the Agreement as follows:

         1. Capitalized terms not specifically defined in this Amendment shall
have the meanings ascribed to them in the Agreement.

         2. Schedule A of the Agreement is hereby deleted in its entirety and a
new Schedule A to the Agreement is substituted to read in its entirety as
follows:


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                                   "SCHEDULE A

         AIM Investment Funds shall be divided into the following Portfolios,
each of which shall have three Classes (Class A, Class B and Class C):

                           AIM Developing Markets Fund
                           AIM Global Growth & Income Fund
                           AIM Latin American Growth Fund
                           AIM Global Consumer Products and Services Fund
                           AIM Global Financial Services Fund
                           AIM Global Health Care Fund
                           AIM Global Infrastructure Fund
                           AIM Global Resources Fund
                           AIM Global Telecommunications and Technology Fund
                           AIM Global Government Income Fund
                           AIM Emerging Markets Debt Fund
                           AIM Strategic Income Fund


Dated: February 11th, 2000"


         3. Except for the above change in Schedule A to the Agreement, the
Agreement shall in all other respects remain in full force and effect.

         4. This Amendment may be executed in any number of counterparts and by
different parties hereto in separate counterparts, each of which when so
executed shall be deemed to be an original and all of which taken together shall
constitute one and the same Amendment.


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         IN WITNESS WHEREOF, the undersigned, being all of the Trustees of the
Trust, have executed this Fifth Amendment to Agreement and Declaration of Trust
of AIM Investment Funds as of the day and year first above written.



/s/ C. DEREK ANDERSON                       /s/ ROBERT H. GRAHAM
--------------------------                  -------------------------
C. Derek Anderson, Trustee                  Robert H. Graham, Trustee


/s/ FRANK S. BAYLEY                         /s/ RUTH H. QUIGLEY
------------------------                    ------------------------
Frank S. Bayley, Trustee                    Ruth H. Quigley, Trustee



                         [THIS IS THE SIGNATURE PAGE FOR
            THE FIFTH AMENDMENT TO AGREEMENT AND DECLARATION OF TRUST
                            OF AIM INVESTMENT FUNDS]


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