diff --git a/src/qtwidgets/views/Separator_qtwidgets.cpp b/src/qtwidgets/views/Separator_qtwidgets.cpp
index e70094b4..a7f95b5d 100644
--- a/src/qtwidgets/views/Separator_qtwidgets.cpp
+++ b/src/qtwidgets/views/Separator_qtwidgets.cpp
@@ -20,6 +20,7 @@
 #include <QPainter>
 #include <QStyleOption>
 
+using namespace KDDockWidgets;
 using namespace KDDockWidgets::Views;
 
 Separator_qtwidgets::Separator_qtwidgets(Controllers::Separator *controller, View *parent)