diff --git a/vllm_omni/entrypoints/openai/serving_chat.py b/vllm_omni/entrypoints/openai/serving_chat.py
index 45f0692d1..32f41a643 100644
--- a/vllm_omni/entrypoints/openai/serving_chat.py
+++ b/vllm_omni/entrypoints/openai/serving_chat.py
@@ -560,7 +560,7 @@ class OmniOpenAIServingChat(OpenAIServingChat, AudioMixin):
         if hasattr(request, "cache_salt") and request.cache_salt is not None:
             engine_prompt["cache_salt"] = request.cache_salt
 
-        speaker = getattr(request, "speaker", None)
+        speaker = getattr(request, "voice", None) or getattr(request, "speaker", None)
         normalized = validate_requested_speaker(speaker, self._get_supported_speakers())
         if normalized is not None:
             if "additional_information" not in engine_prompt or engine_prompt["additional_information"] is None: