diff --git a/BaseTools/Source/C/VfrCompile/VfrUtilityLib.cpp b/BaseTools/Source/C/VfrCompile/VfrUtilityLib.cpp
index 3ca57ed..2f97975 100644
--- a/BaseTools/Source/C/VfrCompile/VfrUtilityLib.cpp
+++ b/BaseTools/Source/C/VfrCompile/VfrUtilityLib.cpp
@@ -3372,7 +3372,7 @@
   UINT8       BlockType;
   EFI_HII_STRING_PACKAGE_HDR *PkgHeader;
   
-  if (mStringFileName == '\0' ) {
+  if (mStringFileName == NULL) {
     return NULL;
   }