diff --git a/src/corelib/thread/qorderedmutexlocker_p.h b/src/corelib/thread/qorderedmutexlocker_p.h
index e0a67388d49..570c5262257 100644
--- a/src/corelib/thread/qorderedmutexlocker_p.h
+++ b/src/corelib/thread/qorderedmutexlocker_p.h
@@ -159,7 +159,7 @@ public:
     void relock() {}
     void unlock() {}
 
-    static bool relock(QBasicMutex *, QBasicMutex *) {}
+    static bool relock(QBasicMutex *, QBasicMutex *) { return false; }
 };
 
 using QBasicMutexLocker = QMutexLocker;