diff --git a/python_apps/airtime_analyzer/airtime_analyzer/message_listener.py b/python_apps/airtime_analyzer/airtime_analyzer/message_listener.py
index ad9553b63..4f1e31084 100644
--- a/python_apps/airtime_analyzer/airtime_analyzer/message_listener.py
+++ b/python_apps/airtime_analyzer/airtime_analyzer/message_listener.py
@@ -134,7 +134,7 @@ class MessageListener:
         self._shutdown = True
         self.disconnect_from_messaging_server()
 
-    def msg_received_callback(channel, method_frame, header_frame, body):
+    def msg_received_callback(self, channel, method_frame, header_frame, body):
         ''' A callback method that runs when a RabbitMQ message is received. 
         
             Here we parse the message, spin up an analyzer process, and report the