diff --git a/lib/tasks/transcribe.js b/lib/tasks/transcribe.js
index 4c47f3a8..30dca36e 100644
--- a/lib/tasks/transcribe.js
+++ b/lib/tasks/transcribe.js
@@ -175,8 +175,8 @@ class TaskTranscribe extends SttTask {
   }
 
   async _setSpeechHandlers(cs, ep, channel) {
-    if (ep._speechHandlersSet) return;
-    ep._speechHandlersSet = true;
+    if (this[`_speechHandlersSet_${channel}`]) return;
+    this[`_speechHandlersSet_${channel}`] = true;
     const opts = this.setChannelVarsForStt(this, this.sttCredentials, this.data.recognizer);
     switch (this.vendor) {
       case 'google':