diff --git a/IntelFsp2Pkg/Library/BaseFspPlatformLib/FspPlatformNotify.c b/IntelFsp2Pkg/Library/BaseFspPlatformLib/FspPlatformNotify.c
index 795bb28c0f..a5a51c804c 100644
--- a/IntelFsp2Pkg/Library/BaseFspPlatformLib/FspPlatformNotify.c
+++ b/IntelFsp2Pkg/Library/BaseFspPlatformLib/FspPlatformNotify.c
@@ -296,6 +296,7 @@ FspTempRamExitDone2 (
 
 **/
 VOID
+EFIAPI
 FspWaitForNotify (
   VOID
   )