diff --git a/vllm/v1/engine/async_llm.py b/vllm/v1/engine/async_llm.py
index 477a4f8a98..8fcee8f92a 100644
--- a/vllm/v1/engine/async_llm.py
+++ b/vllm/v1/engine/async_llm.py
@@ -568,6 +568,7 @@ class AsyncLLM(EngineClient):
     ) -> None:
         if self.stat_loggers is None:
             return
+        # loggers, prom_logger
         per_engine_loggers, _ = self.stat_loggers
         for loggers in per_engine_loggers.values():
             for stat_logger in loggers: