diff --git a/grunt-tasks/clean.js b/grunt-tasks/clean.js
index 63d48ac5e..4afd571eb 100644
--- a/grunt-tasks/clean.js
+++ b/grunt-tasks/clean.js
@@ -1,3 +1,6 @@
+// Delete images in build directory
+// After compressing the images in the build/img dir, there is no need
+// for them
 'use strict';
 
 module.exports = function (grunt) {