diff --git a/src/Gui/MainWindow.cpp b/src/Gui/MainWindow.cpp
index 91be67e666..779c60b98f 100644
--- a/src/Gui/MainWindow.cpp
+++ b/src/Gui/MainWindow.cpp
@@ -23,6 +23,7 @@
 
 #include "PreCompiled.h"
 #ifndef _PreComp_
+# include <QActionGroup>
 # include <QApplication>
 # include <QByteArray>
 # include <QCheckBox>