diff --git a/paddle/fluid/operators/detail/grpc_server.cc b/paddle/fluid/operators/detail/grpc_server.cc
index 26bef375cb3493b4b6a428677986e005654b6be3..44c23db0b1c9008a80c9e5320056dd0a393e9d77 100644
--- a/paddle/fluid/operators/detail/grpc_server.cc
+++ b/paddle/fluid/operators/detail/grpc_server.cc
@@ -153,10 +153,10 @@ class RequestPrefetch final : public RequestBase {
 
   virtual void Process() {
     // prefetch process...
-    ::grpc::ByteBuffer relay;
+    ::grpc::ByteBuffer reply;
     // TODO(Yancey1989): execute the Block which containers prefetch ops
 
-    responder_.Finish(relay, ::grpc::Status::OK, this);
+    responder_.Finish(reply, ::grpc::Status::OK, this);
     status_ = FINISH;
   }