Add missing typename.
@@ -287,7 +287,7 @@ EnumStoreT<EntryT>::allocate_optionally_folded_comparator(bool folded) const
}
template <typename EntryT>
-EnumStoreT<EntryT>::ComparatorType
+typename EnumStoreT<EntryT>::ComparatorType
EnumStoreT<EntryT>::make_optionally_folded_comparator(bool folded) const
{
return (has_string_type() && folded)
