<PAGE>
MFS(R) MUNICIPAL LIMITED MATURITY FUND
MFS FLORIDA MUNICIPAL BOND FUND
MFS TENNESSEE MUNICIPAL BOND FUND
Supplement to the Current Prospectus
For each of the funds listed above, the description of portfolio manager under
the "Management of the Fund - Investment Adviser" section is hereby revised as
follows: John P. Kihn is the portfolio manager of the Fund. Mr. Kihn, a Vice
President of the Adviser, has been employed as a portfolio manager with the
Adviser since October, 1997. From 1996 to 1997, he worked as a Senior
Quantitative Analyst and Vice President of Putnam Investment Management, Inc.;
from 1992 to 1996, he attended the London School of Economics where he was
awarded a doctorate in Accounting and Finance; and from 1994 to 1995, he was an
associate portfolio manager with Colonial Management Associates, Inc.
The date of this Supplement is December 15, 1997.