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                  MERRILL LYNCH OHIO MUNICIPAL BOND FUND OF
               MERRILL LYNCH MULTI-STATE MUNICIPAL SERIES TRUST

                      SUPPLEMENT DATED APRIL 11, 1996 TO
         STATEMENT OF ADDITIONAL INFORMATION DATED NOVEMBER 21, 1995

     The name and biography of the portfolio manager of the Fund, which is
listed under "Management of the Trust -- Trustees and Officers", is revised
as follows:

     FRED STUEBE (44) - Portfolio Manager - Vice President of MLAM since
1989.

Code #16155-1195ALL

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