diff --git a/src/widgets/styles/qstylehelper_p.h b/src/widgets/styles/qstylehelper_p.h
index 48f77a65432..eb9c1d4f008 100644
--- a/src/widgets/styles/qstylehelper_p.h
+++ b/src/widgets/styles/qstylehelper_p.h
@@ -9,6 +9,7 @@
 #include <QtCore/qstringbuilder.h>
 #include <QtGui/qaccessible.h>
 #include <QtGui/qpainter.h>
+#include <QtGui/qguiapplication.h>
 #include <QtWidgets/qwidget.h>
 
 #ifndef QSTYLEHELPER_P_H