diff --git a/src/plugins/qmldesigner/components/annotationeditor/annotationcommenttab.h b/src/plugins/qmldesigner/components/annotationeditor/annotationcommenttab.h
index 5f9605f39f7..6fc647669d3 100644
--- a/src/plugins/qmldesigner/components/annotationeditor/annotationcommenttab.h
+++ b/src/plugins/qmldesigner/components/annotationeditor/annotationcommenttab.h
@@ -29,7 +29,9 @@
 
 #include "annotation.h"
 
+QT_BEGIN_NAMESPACE
 class QDir;
+QT_END_NAMESPACE
 
 namespace QmlDesigner {