diff --git a/clang/lib/Sema/SemaDecl.cpp b/clang/lib/Sema/SemaDecl.cpp
index 493b9be..b89ccce 100644
--- a/clang/lib/Sema/SemaDecl.cpp
+++ b/clang/lib/Sema/SemaDecl.cpp
@@ -1937,9 +1937,9 @@
     //   specifier, any other declaration of that object shall also
     //   have no alignment specifier.
     S.Diag(New->getLocation(), diag::err_alignas_missing_on_definition)
-      << OldAlignasAttr->isC11();
+      << OldAlignasAttr;
     S.Diag(OldAlignasAttr->getLocation(), diag::note_alignas_on_declaration)
-      << OldAlignasAttr->isC11();
+      << OldAlignasAttr;
   }
 
   bool AnyAdded = false;
@@ -2095,9 +2095,9 @@
         //   specifier, any other declaration of that object shall also
         //   have no alignment specifier.
         S.Diag(Def->getLocation(), diag::err_alignas_missing_on_definition)
-          << AA->isC11();
+          << AA;
         S.Diag(NewAttribute->getLocation(), diag::note_alignas_on_declaration)
-          << AA->isC11();
+          << AA;
         NewAttributes.erase(NewAttributes.begin() + I);
         --E;
         continue;