diff --git a/wxPython/demo/LEDNumberCtrl.py b/wxPython/demo/LEDNumberCtrl.py
index 4814864d4b..da45690412 100644
--- a/wxPython/demo/LEDNumberCtrl.py
+++ b/wxPython/demo/LEDNumberCtrl.py
@@ -35,6 +35,10 @@ class TestPanel(wx.Panel):
         self.clock.SetValue(st)
 
 
+    def ShutdownDemo(self):
+        self.timer.Stop()
+        del self.timer
+
 
 #----------------------------------------------------------------------