diff --git a/js/ui/screenShield.js b/js/ui/screenShield.js
index 0fb410781..abd68bd70 100644
--- a/js/ui/screenShield.js
+++ b/js/ui/screenShield.js
@@ -2,6 +2,7 @@
 
 const Clutter = imports.gi.Clutter;
 const Gio = imports.gi.Gio;
+const GLib = imports.gi.GLib;
 const GnomeDesktop = imports.gi.GnomeDesktop;
 const Lang = imports.lang;
 const Meta = imports.gi.Meta;