diff --git a/llvm/include/llvm/IR/Metadata.h b/llvm/include/llvm/IR/Metadata.h
index 4d5b61b4cfbc..5590bc54881f 100644
--- a/llvm/include/llvm/IR/Metadata.h
+++ b/llvm/include/llvm/IR/Metadata.h
@@ -51,7 +51,7 @@ protected:
   enum StorageType { Uniqued, Distinct, Temporary };
 
   /// \brief Storage flag for non-uniqued, otherwise unowned, metadata.
-  StorageType Storage : 2;
+  unsigned Storage : 2;
   // TODO: expose remaining bits to subclasses.
 
   unsigned short SubclassData16;