diff --git a/src/corelib/thread/qmutex.h b/src/corelib/thread/qmutex.h
index 8265086eb74..3e861ca0cb2 100644
--- a/src/corelib/thread/qmutex.h
+++ b/src/corelib/thread/qmutex.h
@@ -305,6 +305,9 @@ public:
         Q_UNUSED(timePoint);
         return true;
     }
+
+private:
+    Q_DISABLE_COPY(QMutex)
 };
 
 class QRecursiveMutex : public QMutex {};