diff --git a/MdePkg/Include/Library/BaseLib.h b/MdePkg/Include/Library/BaseLib.h
index 3d7afd4649..0632230a65 100644
--- a/MdePkg/Include/Library/BaseLib.h
+++ b/MdePkg/Include/Library/BaseLib.h
@@ -7219,5 +7219,6 @@ AsmPrepareAndThunk16 (
   );
 
 #endif
+#endif