<PAGE>
Filed Pursuant to Rule 497(e)
Registration File No.: 33-56239
SUPPLEMENT TO THE PROSPECTUS
OF DEAN WITTER GLOBAL ASSET ALLOCATION FUND
DATED MARCH 2, 1998
On April 30, 1998, the Board of Trustees of Dean Witter Global Asset
Allocation Fund (the "Fund") approved an Agreement and Plan of Reorganization
by and between the Fund and Dean Witter Strategist Fund ("Dean Witter
Strategist"), pursuant to which substantially all of the assets of the Fund
would be combined with those of Dean Witter Strategist and shareholders of
the Fund would become shareholders of Dean Witter Strategist receiving shares
of Dean Witter Strategist equal to the value of their holdings in the Fund
(the "Reorganization"). Each shareholder of the Fund will receive the Class
of shares of Dean Witter Strategist that corresponds to the Class of shares
of the Fund currently held by that shareholder. The Reorganization is subject
to the approval of shareholders of the Fund at a special meeting of
shareholders scheduled to be held on August 19, 1998. A proxy statement
formally detailing the proposal, the reasons for the Trustees' action, and
information concerning Dean Witter Strategist will be distributed to
shareholders of the Fund.
April 30, 1998
