diff --git a/nspanel-lovelace-ui/rootfs/usr/bin/mqtt-manager/main.py b/nspanel-lovelace-ui/rootfs/usr/bin/mqtt-manager/main.py
index 92b3b5b8..d2c5c1e8 100644
--- a/nspanel-lovelace-ui/rootfs/usr/bin/mqtt-manager/main.py
+++ b/nspanel-lovelace-ui/rootfs/usr/bin/mqtt-manager/main.py
@@ -31,7 +31,7 @@ def on_connect(client, userdata, flags, rc):
 
 def on_ha_update(entity_id):
     for panel in panels:
-        panel.ha_event_callback(entity_id)s
+        panel.ha_event_callback(entity_id)
 
 def on_message(client, userdata, msg):
     try: