diff --git a/examples/foundational/22c-natural-conversation-mixed-llms.py b/examples/foundational/22c-natural-conversation-mixed-llms.py
index ff53cd838..d93a40d4d 100644
--- a/examples/foundational/22c-natural-conversation-mixed-llms.py
+++ b/examples/foundational/22c-natural-conversation-mixed-llms.py
@@ -374,7 +374,7 @@ class OutputGate(FrameProcessor):
         self._gate_task = self.get_event_loop().create_task(self._gate_task_handler())
 
     async def _stop(self):
-        await cancel_task(self._gate_task)
+        await self.cancel_task(self._gate_task)
 
     async def _gate_task_handler(self):
         while True: