diff --git a/widgets/busywidget.cpp b/widgets/busywidget.cpp
index efbc7005d..e92354993 100644
--- a/widgets/busywidget.cpp
+++ b/widgets/busywidget.cpp
@@ -137,12 +137,14 @@ void BusyWidget::showEvent(QShowEvent *event)
 void BusyWidget::hideEvent(QHideEvent *event)
 {
     Q_UNUSED(event)
-    killTimer(d->timerId);
+    if (d->timerId)
+        killTimer(d->timerId);
     d->timerId = 0;
 }
 
 void BusyWidget::resizeEvent(QGraphicsSceneResizeEvent *event)
 {
+    Q_UNUSED(event)
     d->frames.clear();
 }