diff --git a/vllm/v1/attention/backends/utils.py b/vllm/v1/attention/backends/utils.py
index 0bd7eaf7f8154..e738d11665683 100644
--- a/vllm/v1/attention/backends/utils.py
+++ b/vllm/v1/attention/backends/utils.py
@@ -43,6 +43,7 @@ class CommonAttentionMetadata:
     max_query_len: int
     """Longest query in batch"""
 
+
 M = TypeVar("M")