diff --git a/clang/include/clang/AST/Redeclarable.h b/clang/include/clang/AST/Redeclarable.h
index be022bf5322ad..091bb886f2d49 100644
--- a/clang/include/clang/AST/Redeclarable.h
+++ b/clang/include/clang/AST/Redeclarable.h
@@ -114,7 +114,9 @@ class Redeclarable {
 
     bool isFirst() const {
       return Link.is<KnownLatest>() ||
-             Link.get<NotKnownLatest>().is<UninitializedLatest>();
+             // FIXME: 'template' is required on the next line due to an
+             // apparent clang bug.
+             Link.get<NotKnownLatest>().template is<UninitializedLatest>();
     }
 
     decl_type *getPrevious(const decl_type *D) const {