diff --git a/EdkCompatibilityPkg/Foundation/Efi/Include/EfiTypes.h b/EdkCompatibilityPkg/Foundation/Efi/Include/EfiTypes.h
index 3114e54600..f73a928860 100644
--- a/EdkCompatibilityPkg/Foundation/Efi/Include/EfiTypes.h
+++ b/EdkCompatibilityPkg/Foundation/Efi/Include/EfiTypes.h
@@ -230,7 +230,7 @@ typedef struct {
 //
 // range requires a runtime mapping
 //
-#define EFI_MEMORY_RUNTIME  0x8000000000000000
+#define EFI_MEMORY_RUNTIME  0x8000000000000000ULL
 
 typedef UINT64  EFI_PHYSICAL_ADDRESS;
 typedef UINT64  EFI_VIRTUAL_ADDRESS;