diff --git a/app/assets/javascripts/discourse/widgets/header.js.es6 b/app/assets/javascripts/discourse/widgets/header.js.es6
index 8f5a9bfde44..a2a4ce39796 100644
--- a/app/assets/javascripts/discourse/widgets/header.js.es6
+++ b/app/assets/javascripts/discourse/widgets/header.js.es6
@@ -214,7 +214,7 @@ export default createWidget('header', {
       panels.push(this.attach('user-menu'));
     }
 
-    this.additionalPanels(attrs, state).map(function(panel) { panels.push(panel) });
+    this.additionalPanels(attrs, state).map(function(panel) { panels.push(panel); });
 
     const contents = [ this.attach('home-logo', { minimized: !!attrs.topic }),
                        h('div.panel.clearfix', panels) ];
@@ -227,8 +227,8 @@ export default createWidget('header', {
   },
 
   // override to allow plugins to append additional panels
-  additionalPanels(attrs, state) {
-    return []
+  additionalPanels() {
+    return [];
   },
 
   updateHighlight() {