Add missing header

d703377a · Konstantinos Sideris · 9e8d41b7 · d703377a
Commit d703377a authored 7 years ago by Konstantinos Sideris
--- a/include/MainWindow.h
+++ b/include/MainWindow.h
@@ -17,6 +17,8 @@

 #pragma once

+#include <functional>
+
 #include <QMainWindow>
 #include <QSharedPointer>
 #include <QStackedWidget>