diff --git a/vllm/envs.py b/vllm/envs.py
index f6c038967b69..edabd647db2f 100644
--- a/vllm/envs.py
+++ b/vllm/envs.py
@@ -321,6 +321,7 @@ def maybe_convert_int(value: Optional[str]) -> Optional[int]:
     # - "XFORMERS": use XFormers
     # - "ROCM_FLASH": use ROCmFlashAttention
     # - "FLASHINFER": use flashinfer
+    # - "FLASHMLA": use FlashMLA
     "VLLM_ATTENTION_BACKEND":
     lambda: os.getenv("VLLM_ATTENTION_BACKEND", None),