diff --git a/src/plugins/qmldesigner/components/formeditor/resizeindicator.h b/src/plugins/qmldesigner/components/formeditor/resizeindicator.h
index 7c234b2679508ac5988e4991adcc8a0ed99786a7..45792031f9c0be503f812d5295f47d07ca11c016 100644
--- a/src/plugins/qmldesigner/components/formeditor/resizeindicator.h
+++ b/src/plugins/qmldesigner/components/formeditor/resizeindicator.h
@@ -35,7 +35,9 @@
 
 #include "resizecontroller.h"
 
+QT_BEGIN_NAMESPACE
 class QGraphicsRectItem;
+QT_END_NAMESPACE
 
 namespace QmlDesigner {