diff --git a/app/assets/javascripts/admin/controllers/admin-user-badges.js.es6 b/app/assets/javascripts/admin/controllers/admin-user-badges.js.es6
index 523668556..7404af5f2 100644
--- a/app/assets/javascripts/admin/controllers/admin-user-badges.js.es6
+++ b/app/assets/javascripts/admin/controllers/admin-user-badges.js.es6
@@ -86,7 +86,7 @@ export default Ember.ArrayController.extend({
     **/
     grantBadge: function(badgeId) {
       var self = this;
-      Discourse.UserBadge.grant(badgeId, this.get('user.username'), this.get('badgeReason')).then(function(userBadge) {
+      Discourse.UserBadge.grant(badgeId, this.get('user.model.username'), this.get('badgeReason')).then(function(userBadge) {
         self.set('badgeReason', '');
         self.pushObject(userBadge);
         Ember.run.next(function() {