SUPPLEMENT DATED APRIL 30, 2012

TO PROSPECTUS DATED APRIL 29, 2011

FOR SUN PRIME SURVIVORSHIP VARIABLE UNIVERSAL LIFE INSURANCE

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

SUN LIFE OF CANADA (U.S.) VARIABLE ACCOUNT I

Effective on or about July 15, 2012, the Invesco Van Kampen V.I. Mid Cap Value Fund will change its name to Invesco Van Kampen V.I. American Value Fund.

THIS SUPPLEMENT SHOULD BE READ AND RETAINED FOR FUTURE REFERENCE.

Sun Prime Survivorship 4/2012