diff --git a/app/assets/javascripts/discourse/controllers/tag-groups.js.es6 b/app/assets/javascripts/discourse/controllers/tag-groups.js.es6
index d4785f36aa7..7ea16868797 100644
--- a/app/assets/javascripts/discourse/controllers/tag-groups.js.es6
+++ b/app/assets/javascripts/discourse/controllers/tag-groups.js.es6
@@ -1,3 +1,5 @@
+import TagGroup from 'discourse/models/tag-group';
+
 export default Ember.Controller.extend({
   actions: {
     selectTagGroup(tagGroup) {
@@ -9,8 +11,7 @@ export default Ember.Controller.extend({
     },
 
     newTagGroup() {
-      const newTagGroup = this.store.createRecord('tag-group');
-      newTagGroup.set('name', I18n.t('tagging.groups.new_name'));
+      const newTagGroup = TagGroup.create({ id: 'new', name: I18n.t('tagging.groups.new_name') });
       this.get('model').pushObject(newTagGroup);
       this.send('selectTagGroup', newTagGroup);
     }
diff --git a/app/assets/javascripts/discourse/models/tag-group.js.es6 b/app/assets/javascripts/discourse/models/tag-group.js.es6
index f27adad26b4..cfbd83e1640 100644
--- a/app/assets/javascripts/discourse/models/tag-group.js.es6
+++ b/app/assets/javascripts/discourse/models/tag-group.js.es6
@@ -9,9 +9,10 @@ const TagGroup = RestModel.extend({
   },
 
   save() {
-    var url = "/tag_groups",
-        self = this;
-    if (this.get('id')) {
+    let url = "/tag_groups";
+    const self = this,
+          isNew = this.get('id') === 'new';
+    if (!isNew) {
       url = "/tag_groups/" + this.get('id');
     }
 
@@ -25,9 +26,11 @@ const TagGroup = RestModel.extend({
         parent_tag_name: this.get('parent_tag_name') ? this.get('parent_tag_name') : undefined,
         one_per_topic: this.get('one_per_topic')
       },
-      type: this.get('id') ? 'PUT' : 'POST'
+      type: isNew ? 'POST' : 'PUT'
     }).then(function(result) {
-      if(result.id) { self.set('id', result.id); }
+      if(result.tag_group && result.tag_group.id) {
+        self.set('id', result.tag_group.id);
+      }
       self.set('savingStatus', I18n.t('saved'));
       self.set('saving', false);
     });