diff --git a/lib/StaticAnalyzer/Checkers/RetainCountChecker.cpp b/lib/StaticAnalyzer/Checkers/RetainCountChecker.cpp
index 37a0bf9..cf06f54 100644
--- a/lib/StaticAnalyzer/Checkers/RetainCountChecker.cpp
+++ b/lib/StaticAnalyzer/Checkers/RetainCountChecker.cpp
@@ -3557,7 +3557,7 @@
   Out << '}';
 }
 
-bool UsesAutorelease(const ProgramState *state) {
+static bool UsesAutorelease(const ProgramState *state) {
   // A state uses autorelease if it allocated an autorelease pool or if it has
   // objects in the caller's autorelease pool.
   return !state->get<AutoreleaseStack>().isEmpty() ||