diff --git a/src/core/thread/qthreadpool.cpp b/src/core/thread/qthreadpool.cpp
index a998bd6e9..b3a88d847 100644
--- a/src/core/thread/qthreadpool.cpp
+++ b/src/core/thread/qthreadpool.cpp
@@ -47,7 +47,7 @@ class QThreadPoolThread : public QThread
 {
 public:
     QThreadPoolThread(QThreadPoolPrivate *manager);
-    void run();
+    void run() final;
     void registerThreadInactive();
 
     QWaitCondition runnableReady;