diff --git a/frigate/comms/dispatcher.py b/frigate/comms/dispatcher.py
index b1af3e9cf..5c69d299b 100644
--- a/frigate/comms/dispatcher.py
+++ b/frigate/comms/dispatcher.py
@@ -253,7 +253,7 @@ class Dispatcher:
         try:
             if "preset" in payload.lower():
                 command = OnvifCommandEnum.preset
-                param = payload.lower()[payloadindex("_") + 1:])
+                param = payload.lower()[payload.index("_") + 1:]
             else:
                 command = OnvifCommandEnum[payload.lower()]
                 param = ""