diff --git a/src/widgets/widgets/qwidgetanimator.cpp b/src/widgets/widgets/qwidgetanimator.cpp
index 1209ade536..a2d950c12b 100644
--- a/src/widgets/widgets/qwidgetanimator.cpp
+++ b/src/widgets/widgets/qwidgetanimator.cpp
@@ -41,6 +41,7 @@
 
 #include <QtCore/qpropertyanimation.h>
 #include <QtWidgets/qwidget.h>
+#include <QtWidgets/qstyle.h>
 #include <private/qmainwindowlayout_p.h>
 
 #include "qwidgetanimator_p.h"