diff --git a/js/ui/keyboard.js b/js/ui/keyboard.js
index 635d9b12e..7d56ef9c8 100644
--- a/js/ui/keyboard.js
+++ b/js/ui/keyboard.js
@@ -498,7 +498,7 @@ var Key = GObject.registerClass({
 var KeyboardModel = class {
     constructor(groupName) {
         let names = [groupName];
-        if (names.includes('+'))
+        if (groupName.includes('+'))
             names.push(groupName.replace(/\+.*/, ''));
         names.push('us');