MFS UNION STANDARD TRUST, 497, 1996-08-21

MFS UNION STANDARD TRUST
497, 1996-08-21

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                         MFS UNION STANDARD EQUITY FUND
                                   A Series of
                            MFS UNION STANDARD TRUST

                     Supplement to the February 1, 1996 Prospectus



MAA  Consulting   Services,   Inc.   ("MAA")  has  agreed  to  assist  MFS  Fund
Distributors,  Inc.  ("MFD")  in the  distribution  of shares  of the  Fund.  In
consideration of such  assistance,  MFD will pay MAA a commission equal to 0.15%
per annum of the Fund's average daily net assets  attributable  to shares of the
Fund  owned  by  shareholders  which  were  introduced  to MFD by MAA and  which
promptly  thereafter,  and as a direct result of the introduction and efforts of
MAA, purchased shares of the Fund.


                     The date of this Supplement is August 20, 1996