diff --git a/stepmania/src/RageThreads.h b/stepmania/src/RageThreads.h
index 6bc03a79ae..aba9dce569 100644
--- a/stepmania/src/RageThreads.h
+++ b/stepmania/src/RageThreads.h
@@ -122,7 +122,7 @@ public:
 	void Unlock();
 };
 
-#define LockMut(m) LockMutex UNIQUE_NAME(LocalLock) (m, __FUNCTION__, __LINE__)
+#define LockMut(m) LockMutex UNIQUE_NAME(LocalLock) (m, __FILE__, __LINE__)
 
 class EventImpl;
 class RageEvent: public RageMutex