diff --git a/python/mlc_llm/serve/sync_engine.py b/python/mlc_llm/serve/sync_engine.py
index dd7276c215..9f4d2fdab9 100644
--- a/python/mlc_llm/serve/sync_engine.py
+++ b/python/mlc_llm/serve/sync_engine.py
@@ -130,7 +130,7 @@ def __init__(  # pylint: disable=too-many-arguments,too-many-locals
                 "add_request",
                 "abort_request",
                 "step",
-                "metrics",
+                "json_metrics",
                 "reset",
                 "get_request_stream_callback",
                 "set_request_stream_callback",