1 files changed, 4 insertions, 1 deletions
diff --git a/src/widgets/kernel/qwidgetwindow_p.h b/src/widgets/kernel/qwidgetwindow_p.h
index 92f1a8b6d4..0ee6b71a79 100644
--- a/src/widgets/kernel/qwidgetwindow_p.h
+++ b/src/widgets/kernel/qwidgetwindow_p.h
@@ -22,6 +22,8 @@
 #include <QtGui/private/qevent_p.h>
 #include <QtWidgets/qwidget.h>
 
+#include <QtCore/qpointer.h>
+
 QT_BEGIN_NAMESPACE
 
 
@@ -81,9 +83,10 @@ protected:
 
 private slots:
     void updateObjectName();
-    void handleScreenChange();
 
 private:
+    void handleScreenChange();
+    void handleDevicePixelRatioChange();
     void repaintWindow();
     bool updateSize();
     void updateMargins();