diff --git a/services/music-render/worker.py b/services/music-render/worker.py
index b84034c..c75b8bc 100644
--- a/services/music-render/worker.py
+++ b/services/music-render/worker.py
@@ -58,7 +58,12 @@ def _dispatch(payload: dict) -> None:
         logger.error("unknown job_type=%s task=%s", job_type, task_id)
         webhook_update_task(task_id, "failed", 0, "", error=f"unknown job_type: {job_type}")
         return
-    fn = getattr(_self, fn_name)
+    try:
+        fn = getattr(_self, fn_name)
+    except AttributeError:
+        logger.error("dispatch table typo for job_type=%s name=%s task=%s", job_type, fn_name, task_id)
+        webhook_update_task(task_id, "failed", 0, "", error=f"internal dispatch error: {fn_name}")
+        return
     fn(task_id, params)