diff --git a/src/http/ngx_http_upstream.h b/src/http/ngx_http_upstream.h
index 7390f2e9e..448d0714f 100644
--- a/src/http/ngx_http_upstream.h
+++ b/src/http/ngx_http_upstream.h
@@ -390,9 +390,6 @@ struct ngx_http_upstream_s {
     unsigned                         request_sent:1;
     unsigned                         request_body_sent:1;
     unsigned                         header_sent:1;
-
-    NGX_COMPAT_BEGIN(1)
-    NGX_COMPAT_END
 };