diff --git a/specs.json b/specs.json
index 4c511e5..872644a 100644
--- a/specs.json
+++ b/specs.json
@@ -708,6 +708,7 @@
           "v2"
         ]
       },
+      "recognizer_id": "string",
       "speechStartTimeoutMs": "number",
       "speechEndTimeoutMs": "number",
       "enableVoiceActivityEvents": "boolean",