diff --git a/src/plugins/platforms/wayland/qwaylandwindow_p.h b/src/plugins/platforms/wayland/qwaylandwindow_p.h
index 234c0645ef4..06d8dbed38b 100644
--- a/src/plugins/platforms/wayland/qwaylandwindow_p.h
+++ b/src/plugins/platforms/wayland/qwaylandwindow_p.h
@@ -301,7 +301,7 @@ protected:
     GestureState mGestureState = GestureNotActive;
 #endif
 
-    bool mFrameCallbackTimedOut = false; // Whether the frame callback has timed out
+    std::atomic_bool mFrameCallbackTimedOut = false; // Whether the frame callback has timed out
     int mFrameCallbackCheckIntervalTimerId = -1;
     QAtomicInt mWaitingForUpdateDelivery = false;