diff --git a/lib/tasks/transcribe.js b/lib/tasks/transcribe.js
index cff2f015..c8599d9c 100644
--- a/lib/tasks/transcribe.js
+++ b/lib/tasks/transcribe.js
@@ -240,7 +240,8 @@ class TaskTranscribe extends SttTask {
       default:
         if (this.vendor.startsWith('custom:')) {
           this.bugname = `${this.vendor}_transcribe`;
-          ep.addCustomEventListener(JambonzTranscriptionEvents.Transcription, this._onTranscription.bind(this, cs, ep));
+          ep.addCustomEventListener(JambonzTranscriptionEvents.Transcription,
+            this._onTranscription.bind(this, cs, ep, channel));
           ep.addCustomEventListener(JambonzTranscriptionEvents.Connect, this._onJambonzConnect.bind(this, cs, ep));
           ep.addCustomEventListener(JambonzTranscriptionEvents.ConnectFailure,
             this._onJambonzConnectFailure.bind(this, cs, ep));