diff --git a/services/transcribestreaming/src/main/resources/codegen-resources/customization.config b/services/transcribestreaming/src/main/resources/codegen-resources/customization.config
index f1a0e18e47b8..4460a0924f95 100644
--- a/services/transcribestreaming/src/main/resources/codegen-resources/customization.config
+++ b/services/transcribestreaming/src/main/resources/codegen-resources/customization.config
@@ -3,6 +3,7 @@
     "skipSyncClientGeneration": true,
     "useLegacyEventGenerationScheme": {
         "TranscriptResultStream": ["TranscriptEvent"],
-        "AudioStream": ["AudioEvent"]
+        "AudioStream": ["AudioEvent"],
+        "MedicalTranscriptResultStream": ["TranscriptEvent"]
       }
 }