diff --git a/lib/application.js b/lib/application.js
index 5721889..2a15b01 100644
--- a/lib/application.js
+++ b/lib/application.js
@@ -93,7 +93,7 @@ module.exports = class Application extends Emitter {
   /**
    * Use the given middleware `fn`.
    *
-   * @param {GeneratorFunction} fn
+   * @param {Function} fn
    * @return {Application} self
    * @api public
    */