diff --git a/UefiPayloadPkg/Library/ResetSystemLib/ResetSystemLib.c b/UefiPayloadPkg/Library/ResetSystemLib/ResetSystemLib.c
index 3fe3c805af..2e4b7fe592 100644
--- a/UefiPayloadPkg/Library/ResetSystemLib/ResetSystemLib.c
+++ b/UefiPayloadPkg/Library/ResetSystemLib/ResetSystemLib.c
@@ -131,24 +131,6 @@ ResetShutdown (
   ASSERT (FALSE);
 }
 
-/**
-  Calling this function causes the system to enter a power state for capsule
-  update.
-
-  Reset update should not return, if it returns, it means the system does
-  not support capsule update.
-
-**/
-VOID
-EFIAPI
-EnterS3WithImmediateWake (
-  VOID
-  )
-{
-  AcpiPmControl (5);
-  ASSERT (FALSE);
-}
-
 /**
   This function causes a systemwide reset. The exact type of the reset is
   defined by the EFI_GUID that follows the Null-terminated Unicode string passed