diff --git a/examples/dockwidgets/MyWidget.h b/examples/dockwidgets/MyWidget.h
index 3c3024b0..26bb49b1 100644
--- a/examples/dockwidgets/MyWidget.h
+++ b/examples/dockwidgets/MyWidget.h
@@ -25,7 +25,9 @@
 
 #include <QWidget>
 
+QT_BEGIN_NAMESPACE
 class QPainter;
+QT_END_NAMESPACE
 
 class MyWidget : public QWidget
 {