SUPPLEMENT DATED JULY 19, 2010

to

PROSPECTUS DATED MAY 1, 2009

for

PREFERRED ADVISOR

Individual Flexible Purchase Payment

Deferred Variable Annuity Contract

Issued by

KMA Variable Account

of

SUN LIFE ASSURANCE COMPANY OF CANADA (U.S.)

On April 15, 2010, shareholders approved the reorganization of the Evergreen Mid Cap Growth Fund into the Wells Fargo Advantage Mid Cap Growth Fundafter the closed of business on July 16, 2010.

Evergreen Mid Cap Growth Fund is no longer available for investment and all references to the fund are hereby deleted from the prospectus.

THIS SUPPLEMENT SHOULD BE READ AND RETAINED FOR FUTURE REFERENCE.

K-100 (1) 7/2010