diff --git a/vllm/entrypoints/api_server.py b/vllm/entrypoints/api_server.py
index c81ff958531..1c027181156 100644
--- a/vllm/entrypoints/api_server.py
+++ b/vllm/entrypoints/api_server.py
@@ -111,7 +111,7 @@ async def init_app(
     engine = (llm_engine
               if llm_engine is not None else AsyncLLMEngine.from_engine_args(
                   engine_args, usage_context=UsageContext.API_SERVER))
-
+    app.state.engine_client = engine
     return app