diff --git a/src/calibre/gui2/dbus_export/demo.py b/src/calibre/gui2/dbus_export/demo.py
index 5e8f18120a..992968ca8a 100644
--- a/src/calibre/gui2/dbus_export/demo.py
+++ b/src/calibre/gui2/dbus_export/demo.py
@@ -35,7 +35,6 @@ class MainWindow(QMainWindow):
         self.setCentralWidget(w)
         self.l = l = QVBoxLayout(w)
         mb = f.create_window_menubar(self)
-        self.setMenuBar(mb)
         m = self.menu_one = mb.addMenu('&One')
         m.aboutToShow.connect(self.about_to_show_one)
         s = self.style()
diff --git a/src/calibre/gui2/dbus_export/widgets.py b/src/calibre/gui2/dbus_export/widgets.py
index c474289bc7..d6dbd2322a 100644
--- a/src/calibre/gui2/dbus_export/widgets.py
+++ b/src/calibre/gui2/dbus_export/widgets.py
@@ -180,7 +180,9 @@ class Factory(QObject):
     def create_window_menubar(self, parent):
         if not QApplication.instance().testAttribute(Qt.AA_DontUseNativeMenuBar) and self.has_global_menu:
             return ExportedMenuBar(parent, self.menu_registrar, self.bus)
-        return QMenuBar(parent)
+        ans = QMenuBar(parent)
+        parent.setMenuBar(ans)
+        return ans
 
     def create_system_tray_icon(self, parent=None, title=None, category=None):
         if self.has_status_notifier: