diff --git a/app/assets/javascripts/admin/components/theme-setting-editor.js.es6 b/app/assets/javascripts/admin/components/theme-setting-editor.js.es6
index 292356d55ae..a99b819466a 100644
--- a/app/assets/javascripts/admin/components/theme-setting-editor.js.es6
+++ b/app/assets/javascripts/admin/components/theme-setting-editor.js.es6
@@ -6,13 +6,16 @@ import { popupAjaxError } from "discourse/lib/ajax-error";
 
 export default Component.extend(BufferedContent, SettingComponent, {
   layoutName: "admin/templates/components/site-setting",
-  _save() {
-    return ajax(`/admin/themes/${this.model.id}/setting`, {
-      type: "PUT",
-      data: {
-        name: this.setting.setting,
-        value: this.get("buffered.value")
-      }
-    }).catch(popupAjaxError);
+
+  _save(callback) {
+    callback(
+      ajax(`/admin/themes/${this.model.id}/setting`, {
+        type: "PUT",
+        data: {
+          name: this.setting.setting,
+          value: this.get("buffered.value")
+        }
+      }).catch(popupAjaxError)
+    );
   }
 });