diff --git a/lib/s3rver.js b/lib/s3rver.js
index 4a70e45d..85e641c2 100644
--- a/lib/s3rver.js
+++ b/lib/s3rver.js
@@ -142,7 +142,7 @@ class S3rver extends Koa {
    */
   stop(callback) {
     if (typeof callback === 'function') {
-      return this.httpServer.stop();
+      return this.httpServer.stop(callback);
     } else {
       return new Promise(resolve => this.httpServer.stop(resolve));
     }