Index: clang/lib/Parse/ParseDecl.cpp
===================================================================
--- clang/lib/Parse/ParseDecl.cpp
+++ clang/lib/Parse/ParseDecl.cpp
@@ -4653,7 +4653,8 @@
   // or opaque-enum-declaration anywhere.
   if (IsElaboratedTypeSpecifier && !getLangOpts().MicrosoftExt &&
       !getLangOpts().ObjC) {
-    ProhibitAttributes(attrs);
+    ProhibitCXX11Attributes(attrs, diag::err_attributes_not_allowed,
+                            /*DiagnoseEmptyAttrs=*/true);
     if (BaseType.isUsable())
       Diag(BaseRange.getBegin(), diag::ext_enum_base_in_type_specifier)
           << (AllowEnumSpecifier == AllowDefiningTypeSpec::Yes) << BaseRange;