diff --git a/src/kernel/qwidget.cpp b/src/kernel/qwidget.cpp
index 856907c..20d86dc 100644
--- a/src/kernel/qwidget.cpp
+++ b/src/kernel/qwidget.cpp
@@ -5943,9 +5943,9 @@ QWidget  *QWidget::childAt( const QPoint & p, bool includeThis ) const
 
 void QWidget::updateGeometry()
 {
-    if ( !isTopLevel() && isShown() )
-	QApplication::postEvent( parentWidget(),
-				 new QEvent( QEvent::LayoutHint ) );
+  QWidget *parent = parentWidget();
+  if (parent && !isTopLevel() && isShown())
+	  QApplication::postEvent(parent, new QEvent(QEvent::LayoutHint));
 }