1 files changed, 4 insertions, 0 deletions
diff --git a/src/stream/ngx_stream.c b/src/stream/ngx_stream.c
index 18aea28af..1c5e7a87c 100644
--- a/src/stream/ngx_stream.c
+++ b/src/stream/ngx_stream.c
@@ -410,6 +410,10 @@ ngx_stream_optimize_servers(ngx_conf_t *cf, ngx_array_t *ports)
                 break;
             }
 
+            if (ngx_clone_listening(cf, ls) != NGX_OK) {
+                return NGX_CONF_ERROR;
+            }
+
             addr++;
             last--;
         }