diff --git a/src/plugins/qmldesigner/components/propertyeditor/tooltip.h b/src/plugins/qmldesigner/components/propertyeditor/tooltip.h
index 8487308d11c..785a1b51d42 100644
--- a/src/plugins/qmldesigner/components/propertyeditor/tooltip.h
+++ b/src/plugins/qmldesigner/components/propertyeditor/tooltip.h
@@ -44,8 +44,10 @@
 
 #include <QtCore/qobject.h>
 
+QT_BEGIN_NAMESPACE
 class QPointF;
 class QQuickItem;
+QT_END_NAMESPACE
 
 class Tooltip : public QObject
 {