diff --git a/README.md b/README.md
index fffc2af..0d48993 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-This project is exacted from [tengine](https://github.com/alibaba/tengine/tree/master/modules/ngx_multi_upstream_module) since tengine-2.3.2.
+This project is exacted from [tengine](https://github.com/alibaba/tengine/tree/master/modules/ngx_multi_upstream_module) since tengine-2.4.0.
 
 # ngx_multi_upstream_module
 ngx_multi_upstream_module for nginx
diff --git a/ngx_http_multi_upstream_module.c b/ngx_http_multi_upstream_module.c
index e6940df..a894b81 100644
--- a/ngx_http_multi_upstream_module.c
+++ b/ngx_http_multi_upstream_module.c
@@ -452,9 +452,6 @@ ngx_http_multi_upstream_init_connection(ngx_connection_t *c,
     fake_u->peer.connection = c;
 #if (NGX_HAVE_FILE_AIO || NGX_COMPAT)
     fake_u->output.aio_handler = u->output.aio_handler;
-#if (NGX_HAVE_AIO_SENDFILE || NGX_COMPAT)
-    fake_u->output.aio_preload = u->output.aio_preload;
-#endif
 #endif
 
 #if (NGX_THREADS || NGX_COMPAT)