diff --git a/frontend/src/plugins/userManagement/collections/userCollection.js b/frontend/src/plugins/userManagement/collections/userCollection.js
index d6a42dc349..3cef417b84 100644
--- a/frontend/src/plugins/userManagement/collections/userCollection.js
+++ b/frontend/src/plugins/userManagement/collections/userCollection.js
@@ -5,7 +5,9 @@ define(function(require) {
 
   var UserCollection = Backbone.Collection.extend({
     model: UserModel,
-    comparator: 'email',
+    comparator: function(model) {
+      return model.get('email').toLowerCase();
+    },
     url: 'api/user'
   });