diff --git a/src/Main/FreeCADGuiPy.cpp b/src/Main/FreeCADGuiPy.cpp
index 32f82207a6..0fd4dd6653 100644
--- a/src/Main/FreeCADGuiPy.cpp
+++ b/src/Main/FreeCADGuiPy.cpp
@@ -288,7 +288,6 @@ QWidget* setupMainWindow()
         Base::PyGILStateLocker lock;
         PyObject* input = PySys_GetObject("stdin");
         Gui::MainWindow *mw = new Gui::MainWindow();
-        mw->setAttribute(Qt::WA_DeleteOnClose);
         hasMainWindow = true;
 
         QIcon icon = qApp->windowIcon();