diff --git a/src/http/ngx_http_upstream.c b/src/http/ngx_http_upstream.c
index 828b7d726..6e5cab8ed 100644
--- a/src/http/ngx_http_upstream.c
+++ b/src/http/ngx_http_upstream.c
@@ -5760,12 +5760,6 @@ ngx_http_upstream_add(ngx_conf_t *cf, ngx_url_t *u, ngx_uint_t flags)
             continue;
         }
 
-        if (uscfp[i]->default_port && u->default_port
-            && uscfp[i]->default_port != u->default_port)
-        {
-            continue;
-        }
-
         if (flags & NGX_HTTP_UPSTREAM_CREATE) {
             uscfp[i]->flags = flags;
             uscfp[i]->port = 0;