1 files changed, 1 insertions, 1 deletions
diff --git a/common/system.h b/common/system.h
index 32e55e4879..ecf0d4c05c 100644
--- a/common/system.h
+++ b/common/system.h
@@ -38,7 +38,7 @@
  */
 class OSystem {
 public:
-	typedef void *MutexRef;
+	typedef struct Mutex *MutexRef;
 	typedef int ThreadProc(void *param);
 	typedef void SoundProc(void *param, byte *buf, int len);
 	//typedef int TimerProc(int interval);