diff --git a/third_party/vllm/vllm/distributed/kv_transfer/kv_connector/v1/mooncake/mooncake_connector.py b/third_party/vllm/vllm/distributed/kv_transfer/kv_connector/v1/mooncake/mooncake_connector.py
index b2bec04..7f234bc 100644
--- a/third_party/vllm/vllm/distributed/kv_transfer/kv_connector/v1/mooncake/mooncake_connector.py
+++ b/third_party/vllm/vllm/distributed/kv_transfer/kv_connector/v1/mooncake/mooncake_connector.py
@@ -5,7 +5,7 @@ import threading
 import time
 from collections import defaultdict
 from concurrent.futures import ThreadPoolExecutor
-from dataclasses import dataclass
+from dataclasses import dataclass, field
 from enum import IntEnum
 from typing import TYPE_CHECKING, Any