diff --git a/src/gui/src/MainWindow.cpp b/src/gui/src/MainWindow.cpp
index 69b6b5b5..34a2a9d4 100644
--- a/src/gui/src/MainWindow.cpp
+++ b/src/gui/src/MainWindow.cpp
@@ -45,6 +45,7 @@
 #include <QMessageBox>
 #include <QFileDialog>
 #include <QDesktopServices>
+#include <QDesktopWidget>
 
 #if defined(Q_OS_MAC)
 #include <ApplicationServices/ApplicationServices.h>