diff --git a/src/multimedia/camera/qcameraviewfindersettings.h b/src/multimedia/camera/qcameraviewfindersettings.h
index 31c7329c..ce10b68a 100644
--- a/src/multimedia/camera/qcameraviewfindersettings.h
+++ b/src/multimedia/camera/qcameraviewfindersettings.h
@@ -38,6 +38,7 @@
 #include <QtMultimedia/qvideoframe.h>
 
 #include <QtCore/qshareddata.h>
+#include <QtCore/qsize.h>
 
 QT_BEGIN_NAMESPACE