diff --git a/src/sync.h b/src/sync.h
index 40709bdd7fe..3857eda56b6 100644
--- a/src/sync.h
+++ b/src/sync.h
@@ -20,7 +20,7 @@
 ////////////////////////////////////////////////
 
 /*
-CCriticalSection mutex;
+RecursiveMutex mutex;
     std::recursive_mutex mutex;
 
 LOCK(mutex);
@@ -104,6 +104,7 @@ public:
  * Wrapped mutex: supports recursive locking, but no waiting
  * TODO: We should move away from using the recursive lock by default.
  */
+using RecursiveMutex = AnnotatedMixin<std::recursive_mutex>;
 typedef AnnotatedMixin<std::recursive_mutex> CCriticalSection;
 
 /** Wrapped mutex: supports waiting but not recursive locking */