Supplement to the Current Prospectus

MFS(R) Total Return Fund

Effective April 1, 2008, the introduction and table in the sub-section entitled
"Expense Table" under the main heading "Expense Summary" is restated as follows,
with respect to Class 529A, 529B, 529C, and R1 shares only:


Expense Table

This table describes the fees and expenses that you may pay when you buy,
redeem, and hold shares of the fund. The annual fund operating expenses are
based on expenses incurred during the fund's most recently completed fiscal
year, adjusted to reflect annualized expenses and current fee arrangements. The
fund's annual operating expenses may vary in future years.

Shareholder Fees (fees paid directly from your investment):
- ----------------------------------------------------------------------------
- ----------------------------------------------------------------------------
Share Class                     529A       529B     529C        All R
- ----------------------------------------------------------------------------
- ----------------------------------------------------------------------------
Maximum Sales Charge (Load)    5.75%       N/A       N/A         N/A
Imposed on Purchases (as a
percentage of offering
price)......................
- ----------------------------------------------------------------------------
- ----------------------------------------------------------------------------
Maximum Deferred Sales      See Below(#)  4.00%     1.00%        N/A
Charge (Load) (as a
percentage of original
purchase price or
redemption proceeds,
whichever is less)..........
- ----------------------------------------------------------------------------
- ----------------------------------------------------------------------------

Annual Fund Operating Expenses (expenses that are deducted from fund assets):
- ----------------------------------------------------------------------------
Share Class                             529A        529B         529C
- ----------------------------------------------------------------------------
- ----------------------------------------------------------------------------
Management Fee......................   0.35%       0.35%         0.35%
Distribution and/or Service (12b-1)
Fees(1).............................   0.35%       1.00%         1.00%
Other Expenses(2)...................   0.43%       0.43%         0.43%
                                       -----       -----         -----
Total Annual Fund Operating
Expenses(2).........................   1.13%       1.78%         1.78%

- ----------------------------------------------------------------------------
- ----------------------------------------------------------------------------
Share Class                                                       R1
- ----------------------------------------------------------------------------
- ----------------------------------------------------------------------------
Management Fee..............................................     0.35%
Distribution and/or Service (12b-1) Fees(1).................     1.00%
Other Expenses(2)...........................................     0.18%
                                                                 -----
Total Annual Fund Operating Expenses(2).....................     1.53%


                                       1




Effective March 1, 2008, the last sentence in footnote (2) to the table in the
sub-section entitled "Expense Table" is hereby deleted.


Effective April 1, 2008, the sub-section entitled "Example of Expenses" under
the main heading "Expense Summary" is restated as follows, with respect to Class
529A, 529B, 529C, and Class R1 shares only:


Example of Expenses

These examples are intended to help you compare the cost of investing in the
fund with the cost of investing in other mutual funds.

The examples assume that:

o........You invest $10,000 in the fund for the time periods indicated and you
         redeem your shares at the end of the time periods (unless otherwise
         indicated);

o        Your investment has a 5% return each year and dividends and other
         distributions are reinvested; and

o The fund's operating expenses remain the same.

Although your actual costs may be higher or lower, under these assumptions your
costs would be:

- ----------------------------------------------------------------------------
Share Class                              1 Year  3 Years  5 Years  10 Years
- ----------------------------------------------------------------------------
- ----------------------------------------------------------------------------
529A Shares                                $684     $913   $1,161    $1,871
- ----------------------------------------------------------------------------
- ----------------------------------------------------------------------------
529B Shares(1)
- ----------------------------------------------------------------------------
- ----------------------------------------------------------------------------
      Assuming Redemption at End of
Period                                     $581     $860   $1,164    $1,924
- ----------------------------------------------------------------------------
- ----------------------------------------------------------------------------
      Assuming No Redemption               $181     $560     $964    $1,924
- ----------------------------------------------------------------------------
- ----------------------------------------------------------------------------
529C Shares
- ----------------------------------------------------------------------------
- ----------------------------------------------------------------------------
      Assuming Redemption at End of
Period                                     $281     $560     $964    $2,095
- ----------------------------------------------------------------------------
- ----------------------------------------------------------------------------
      Assuming No Redemption               $181     $560     $964    $2,095
- ----------------------------------------------------------------------------
- ----------------------------------------------------------------------------
R1 Shares                                  $156     $483     $834    $1,824
- ----------------------------------------------------------------------------

(1)  Class 529B shares convert to Class 529A shares approximately eight years
     after purchase; therefore, years nine and ten reflect Class 529A expenses.


Effective March 1, 2008, the second paragraph of the sub-section entitled
"Administrator" under the main heading "Management of the Fund" is hereby
deleted.

                                       2



Effective April 1, 2008, the sub-section entitled "Program Manager(s)" under the
main heading "Management of the Fund" is hereby restated as follows:


Program Manager(s)

MFD serves as program manager for a qualified tuition program under Section 529
of the Internal Revenue Code through which 529 share classes of the fund are
included as investment options to program participants. MFD provides, either
directly or through third parties, recordkeeping, tax reporting, and account
services, as well as services designed to maintain the program's compliance with
the Internal Revenue Code (the "Code") and other regulatory requirements under a
Master 529 Administrative Services Agreement. The fund's 529 share classes may
also be offered through qualified tuition programs for which MFD does not serve
as program manager.

Under the Agreement, the fund pays MFD an annual fee of up to 0.10% of the
average daily net assets attributable to each 529 share class. MFD pays all or a
portion of this fee to third parties.

Please consult the program description for your particular qualified tuition
program for a discussion of the fees paid to and services received from the
program manager.

Effective March 1, 2008, the table in the sub-section entitled "Distribution and
Service Fees" under the main heading "Description of Share Classes" is restated
as follows, with respect to Class R1 shares only:

- ----------------------------------------------------------------------------
Class              Maximum         Maximum Service       Maximum Total
                                                                Distribution and
               Distribution Fee          Fee              Service Fee
- ----------------------------------------------------------------------------
- ----------------------------------------------------------------------------
Class R1            0.75%               0.25%                1.00%
- ----------------------------------------------------------------------------

Effective April 1, 2008, the first two paragraphs of the sub-section entitled
"529 Share Classes" under the main heading "How to Purchase, Redeem, and
Exchange Shares" are restated as follows:

529 Share Classes. With respect to the 529 share classes, you can establish an
account by having your financial intermediary process your purchase. Generally,
the minimum initial investment is $250. MFSC waives or lowers the initial
investment minimums for certain types of investors and investments.

                                       3


You may have your financial intermediary process your subsequent purchases or
you may contact MFSC directly. Generally, there is no minimum for subsequent
investments.


               The date of this supplement is April 1, 2008.