diff --git a/widgets/mainwindow.h b/widgets/mainwindow.h
index 61d00c548..490640527 100644
--- a/widgets/mainwindow.h
+++ b/widgets/mainwindow.h
@@ -4,7 +4,10 @@
 #include "widgets/notebook.h"
 #include "widgets/titlebar.h"
 
+#ifdef USEWINSDK
 #include <platform/borderless/qwinwidget.h>
+#endif
+
 #include <QMainWindow>
 #include <boost/property_tree/ptree.hpp>