1 files changed, 2 insertions, 0 deletions
diff --git a/lib/Lex/PPMacroExpansion.cpp b/lib/Lex/PPMacroExpansion.cpp
index a6bfc32e22139..8af9a50cc204c 100644
--- a/lib/Lex/PPMacroExpansion.cpp
+++ b/lib/Lex/PPMacroExpansion.cpp
@@ -1315,6 +1315,8 @@ static bool HasExtension(const Preprocessor &PP, StringRef Extension) {
            .Case("cxx_binary_literals", true)
            .Case("cxx_init_captures", LangOpts.CPlusPlus11)
            .Case("cxx_variable_templates", LangOpts.CPlusPlus)
+           // Miscellaneous language extensions
+           .Case("overloadable_unmarked", true)
            .Default(false);
 }