<PAGE>
SUPPLEMENT TO THE PROSPECTUS OF
DEAN WITTER SHORT-TERM U.S. TREASURY TRUST
DATED JULY 21, 1995
The disclosure contained in the section entitled "PURCHASE OF FUND SHARES"
in the above Prospectus is hereby modified to reflect that the minimum initial
purchase in the case of investments through EasyInvest, an automatic purchase
plan, is $1,000, provided that the schedule of automatic investments will result
in investments totalling at least $10,000 within the first twelve months.
The disclosure contained in the section entitled "REPURCHASES AND
REDEMPTIONS -- Involuntary Redemption" in the above Prospectus is hereby
modified to provide that, in the case of an account opened through EasyInvest,
the Fund reserves the right, on sixty days' notice, to redeem, at their net
asset value, the shares of any shareholder if after twelve months the
shareholder has invested less than $10,000 in the account.
February 20, 1996