diff --git a/hub.py b/hub.py
index cf2af1da..666514da 100644
--- a/hub.py
+++ b/hub.py
@@ -86,7 +86,7 @@ def set_max_fuel(self, value):
 
     def fuel_alert(self):
         if self.visual_alert:
-            self.application.alert(self.centralwidget, 5000)
+            self.application.alert(self.main_window.centralwidget, 5000)
         if self.sound_alert:
             if self.sound_path:
                 self.player.play()