diff --git a/MdeModulePkg/Universal/Variable/EmuRuntimeDxe/EmuVariable.c b/MdeModulePkg/Universal/Variable/EmuRuntimeDxe/EmuVariable.c
index b22739c22d..84d22d8dcf 100644
--- a/MdeModulePkg/Universal/Variable/EmuRuntimeDxe/EmuVariable.c
+++ b/MdeModulePkg/Universal/Variable/EmuRuntimeDxe/EmuVariable.c
@@ -268,7 +268,7 @@ GetEndPointer (
   //
   // The end of variable store
   //
-  return (VARIABLE_HEADER *) HEADER_ALIGN (VolHeader + VolHeader->Size);
+  return (VARIABLE_HEADER *) HEADER_ALIGN ((UINTN) VolHeader + VolHeader->Size);
 }
 
 /**