diff --git a/lib/application.js b/lib/application.js
index babf4c6..89e575c 100644
--- a/lib/application.js
+++ b/lib/application.js
@@ -181,7 +181,7 @@ function *respond(next){
   this.status = 200;
   if (this.app.poweredBy) this.set('X-Powered-By', 'koa');
 
-  yield next;
+  yield *next;
 
   var res = this.res;
   if (res.headersSent || !res.socket.writable) return;