diff --git a/js/ui/status/keyboard.js b/js/ui/status/keyboard.js
index dbe5ded51..9383e9c2c 100644
--- a/js/ui/status/keyboard.js
+++ b/js/ui/status/keyboard.js
@@ -13,8 +13,8 @@ const PanelMenu = imports.ui.panelMenu;
 const SwitcherPopup = imports.ui.switcherPopup;
 const Util = imports.misc.util;
 
-const INPUT_SOURCE_TYPE_XKB = 'xkb';
-const INPUT_SOURCE_TYPE_IBUS = 'ibus';
+var INPUT_SOURCE_TYPE_XKB = 'xkb';
+var INPUT_SOURCE_TYPE_IBUS = 'ibus';
 
 var LayoutMenuItem = GObject.registerClass(
 class LayoutMenuItem extends PopupMenu.PopupBaseMenuItem {