diff --git a/MdeModulePkg/Library/PiDxeS3BootScriptLib/BootScriptSave.c b/MdeModulePkg/Library/PiDxeS3BootScriptLib/BootScriptSave.c
index f6de986e08..0ff73211ac 100644
--- a/MdeModulePkg/Library/PiDxeS3BootScriptLib/BootScriptSave.c
+++ b/MdeModulePkg/Library/PiDxeS3BootScriptLib/BootScriptSave.c
@@ -624,7 +624,7 @@ S3BootScriptLibDeinitialize (
     Status = PcdSet64S (PcdS3BootScriptTablePrivateDataPtr, 0);
     ASSERT_EFI_ERROR (Status);
   }
-  if (mS3BootScriptTableSmmAllocated) {
+  if ((mSmst != NULL) && mS3BootScriptTableSmmAllocated) {
     Status = mSmst->SmmFreePool (mS3BootScriptTableSmmPtr);
     ASSERT_EFI_ERROR (Status);
     Status = PcdSet64S (PcdS3BootScriptTablePrivateSmmDataPtr, 0);