diff --git a/clang/lib/Parse/Parser.cpp b/clang/lib/Parse/Parser.cpp
index 60e83ac221c8..beae8f04b671 100644
--- a/clang/lib/Parse/Parser.cpp
+++ b/clang/lib/Parse/Parser.cpp
@@ -253,7 +253,7 @@ void Parser::ConsumeExtraSemi(ExtraSemiKind Kind, unsigned TST) {
 // Error recovery.
 //===----------------------------------------------------------------------===//
 
-bool HasFlagsSet(Parser::SkipUntilFlags L, Parser::SkipUntilFlags R) {
+static bool HasFlagsSet(Parser::SkipUntilFlags L, Parser::SkipUntilFlags R) {
   return (static_cast<unsigned>(L) & static_cast<unsigned>(R)) != 0;
 }