diff --git a/vllm/model_executor/layers/fused_moe/pplx_prepare_finalize.py b/vllm/model_executor/layers/fused_moe/pplx_prepare_finalize.py
index 46f1231a617b8..4cd68608f020e 100644
--- a/vllm/model_executor/layers/fused_moe/pplx_prepare_finalize.py
+++ b/vllm/model_executor/layers/fused_moe/pplx_prepare_finalize.py
@@ -111,7 +111,7 @@ class PplxPrepareAndFinalize(mk.FusedMoEPrepareAndFinalize):
         # topk_indices_dtype() int32
         #
         if expert_map is not None:
-            logger.warn_once(
+            logger.warning_once(
                 "The PPLX backend does not support expert mapping. "
                 "The provided `expert_map` will be ignored.")
         expert_map = None  #noqa: F841