diff --git a/include/MainWindow.h b/include/MainWindow.h
index 0c2587e1..e3a5e19d 100644
--- a/include/MainWindow.h
+++ b/include/MainWindow.h
@@ -17,6 +17,8 @@
 
 #pragma once
 
+#include <functional>
+
 #include <QMainWindow>
 #include <QSharedPointer>
 #include <QStackedWidget>