diff --git a/lib/application.js b/lib/application.js
index 5e09e8a..a9b76fb 100644
--- a/lib/application.js
+++ b/lib/application.js
@@ -125,7 +125,7 @@ module.exports = class Application extends Emitter {
   callback() {
     const fn = compose(this.middleware);
 
-    if (!this.listeners('error').length) this.on('error', this.onerror);
+    if (!this.listenerCount('error')) this.on('error', this.onerror);
 
     const handleRequest = (req, res) => {
       const ctx = this.createContext(req, res);