diff --git a/src/gui/src/MainWindow.cpp b/src/gui/src/MainWindow.cpp
index f4cf9a694..b847703f0 100644
--- a/src/gui/src/MainWindow.cpp
+++ b/src/gui/src/MainWindow.cpp
@@ -1509,7 +1509,7 @@ void MainWindow::enableClient(bool enable)
 void MainWindow::closeEvent(QCloseEvent* event)
 {
 #if defined (Q_OS_LINUX)
-    qApp->quit();
+    QCoreApplication::quit();
 #endif
     QWidget::closeEvent(event);
 }