diff --git a/vllm/engine/multiprocessing/client.py b/vllm/engine/multiprocessing/client.py
index 8988e6051f119..d5636b606e00a 100644
--- a/vllm/engine/multiprocessing/client.py
+++ b/vllm/engine/multiprocessing/client.py
@@ -387,7 +387,9 @@ async def abort(self, request_id: str):
 
         with suppress(MQClientClosedError):
             await self._send_one_way_rpc_request(
-                request=RPCAbortRequest(request_id), socket=self.input_socket)
+                request=RPCAbortRequest(request_id),
+                secret_key=self.secret_key,
+                socket=self.input_socket)
 
     async def do_log_stats(
         self,