diff --git a/lib/tasks/transcribe.js b/lib/tasks/transcribe.js
index 4ae379f4..1c5a991c 100644
--- a/lib/tasks/transcribe.js
+++ b/lib/tasks/transcribe.js
@@ -87,7 +87,6 @@ class TaskTranscribe extends SttTask {
 
   async exec(cs, obj) {
     try {
-      this.hasFallbackAsrFromStart = cs.hasFallbackAsr;
       await this.handling(cs, obj);
     } catch (error) {
       if (error instanceof SpeechCredentialError) {