diff --git a/src/plugins/qnx/blackberryndksettingswidget.h b/src/plugins/qnx/blackberryndksettingswidget.h
index 797ebe10fbc..a841edec140 100644
--- a/src/plugins/qnx/blackberryndksettingswidget.h
+++ b/src/plugins/qnx/blackberryndksettingswidget.h
@@ -34,8 +34,10 @@
 
 #include <QWidget>
 
+QT_BEGIN_NAMESPACE
 class QStandardItemModel;
 class QTreeWidgetItem;
+QT_END_NAMESPACE
 
 namespace Qnx {
 namespace Internal {