diff --git a/src/widgets/kernel/qwindowcontainer.cpp b/src/widgets/kernel/qwindowcontainer.cpp
index d388327687..097931913e 100644
--- a/src/widgets/kernel/qwindowcontainer.cpp
+++ b/src/widgets/kernel/qwindowcontainer.cpp
@@ -48,6 +48,7 @@
 #include <QMdiSubWindow>
 #endif
 #include <QAbstractScrollArea>
+#include <QPainter>
 
 QT_BEGIN_NAMESPACE