diff --git a/UefiPayloadPkg/BlSupportSmm/BlSupportSmm.c b/UefiPayloadPkg/BlSupportSmm/BlSupportSmm.c
index dcc4d60bb2..0d16aec8ef 100644
--- a/UefiPayloadPkg/BlSupportSmm/BlSupportSmm.c
+++ b/UefiPayloadPkg/BlSupportSmm/BlSupportSmm.c
@@ -191,6 +191,7 @@ SmmFeatureLockOnS3 (
   @param[in] ProcedureArgument  Pointer to SMRR_BASE_MASK structure.
 **/
 VOID
+EFIAPI
 SetSmrr (
   IN VOID  *ProcedureArgument
   )