diff --git a/utils/mqtt_sender/mqtt_sender.py b/utils/mqtt_sender/mqtt_sender.py
index 6e782ecf..0762a299 100644
--- a/utils/mqtt_sender/mqtt_sender.py
+++ b/utils/mqtt_sender/mqtt_sender.py
@@ -44,7 +44,7 @@ def sigint_handler(signal, frame):
     sys.exit(0)
 
 
-def main:
+def main():
     client = mqtt.Client()
     client.on_connect = on_connect
     client.on_publish = on_publish