diff --git a/app/ui/main_app_window.py b/app/ui/main_app_window.py
index f56b8cd5..92f2b23b 100644
--- a/app/ui/main_app_window.py
+++ b/app/ui/main_app_window.py
@@ -2745,7 +2745,8 @@ class Application(Gtk.Application):
     def update_state_on_full_screen(self, visible):
         self._main_data_box.set_visible(visible)
         self._player_tool_bar.set_visible(visible)
-        self._control_box.set_visible(visible)
+        if self._control_box:
+            self._control_box.set_visible(visible)
         self._status_bar_box.set_visible(visible and not self._app_info_box.get_visible())
 
     @run_idle