diff --git a/script/RobotTCP.py b/script/RobotTCP.py
index 1ec5843..9e46879 100644
--- a/script/RobotTCP.py
+++ b/script/RobotTCP.py
@@ -215,7 +215,7 @@ class RobotTCP(TcpDevice, Stoppable):
         ev = self.read_event()                    
         if ev is not None:
             self.getLogger().info(ev)
-            sef.on_event(ev)
+            self.on_event(ev)
 
     def doUpdate(self):
         try: