diff --git a/ecommerce/static/js/models/course_model.js b/ecommerce/static/js/models/course_model.js
index 6a0e63f42ec..8b13259d6ff 100644
--- a/ecommerce/static/js/models/course_model.js
+++ b/ecommerce/static/js/models/course_model.js
@@ -31,6 +31,8 @@ define([
 
         return Backbone.RelationalModel.extend({
             urlRoot: '/api/v2/courses/',
+            // course detail page url was not matching because of missing trailing slash,
+            // with thi function, trailing slash will be added to match the url
             url: function() {
                 return Backbone.Model.prototype.url.call(this) + '/';
             },