diff --git a/src/widgets/styles/qcommonstyle_p.h b/src/widgets/styles/qcommonstyle_p.h
index d6c701cc2c..bd35dd4cfc 100644
--- a/src/widgets/styles/qcommonstyle_p.h
+++ b/src/widgets/styles/qcommonstyle_p.h
@@ -5,6 +5,7 @@
 #define QCOMMONSTYLE_P_H
 
 #include <QtWidgets/private/qtwidgetsglobal_p.h>
+#include "qhash.h"
 #include "qcommonstyle.h"
 #include "qstyle_p.h"
 #if QT_CONFIG(animation)