diff --git a/src/engine.py b/src/engine.py
index 80bf72b..75f007e 100644
--- a/src/engine.py
+++ b/src/engine.py
@@ -358,7 +358,10 @@ class OpenAIvLLMEngine(vLLMEngine):
         )
 
         if hasattr(self.chat_engine, 'warmup'):
-            await self.chat_engine.warmup()
+            import asyncio
+            result = self.chat_engine.warmup()
+            if asyncio.iscoroutine(result):
+                await result
 
     async def generate(self, openai_request: JobInput):
         # Ensure engines are ready (no-op if already initialized at startup)