diff --git a/js/ui/messageTray.js b/js/ui/messageTray.js
index 0ba3e6238..c87a2983c 100644
--- a/js/ui/messageTray.js
+++ b/js/ui/messageTray.js
@@ -1685,7 +1685,7 @@ const MessageTray = new Lang.Class({
 
         this._userActiveWhileNotificationShown = false;
 
-        this.idleMonitor = new GnomeDesktop.IdleMonitor();
+        this.idleMonitor = Meta.IdleMonitor.get_core();
 
         this._grabHelper = new GrabHelper.GrabHelper(this.actor,
                                                      { keybindingMode: Shell.KeyBindingMode.MESSAGE_TRAY });
diff --git a/js/ui/pointerWatcher.js b/js/ui/pointerWatcher.js
index 38339b8f9..87b4b7431 100644
--- a/js/ui/pointerWatcher.js
+++ b/js/ui/pointerWatcher.js
@@ -2,6 +2,7 @@
 
 const Lang = imports.lang;
 const Mainloop = imports.mainloop;
+const Meta = imports.gi.Meta;
 const GnomeDesktop = imports.gi.GnomeDesktop;
 const Shell = imports.gi.Shell;
 
@@ -41,7 +42,7 @@ const PointerWatcher = new Lang.Class({
     Name: 'PointerWatcher',
 
     _init: function() {
-        this._idleMonitor = new GnomeDesktop.IdleMonitor();
+        this._idleMonitor = Meta.IdleMonitor.get_core();
         this._idleMonitor.add_idle_watch(IDLE_TIME, Lang.bind(this, this._onIdleMonitorBecameIdle));
         this._idle = this._idleMonitor.get_idletime() > IDLE_TIME;
         this._watches = [];
diff --git a/js/ui/screenShield.js b/js/ui/screenShield.js
index f9ab4e9cb..304ef349f 100644
--- a/js/ui/screenShield.js
+++ b/js/ui/screenShield.js
@@ -592,7 +592,7 @@ const ScreenShield = new Lang.Class({
                                                       fadeFactor: 1 });
         this._shortLightbox.connect('shown', Lang.bind(this, this._onShortLightboxShown));
 
-        this.idleMonitor = new GnomeDesktop.IdleMonitor();
+        this.idleMonitor = Meta.IdleMonitor.get_core();
     },
 
     _createBackground: function(monitorIndex) {
diff --git a/js/ui/unlockDialog.js b/js/ui/unlockDialog.js
index 13a2bd416..b0d342b9e 100644
--- a/js/ui/unlockDialog.js
+++ b/js/ui/unlockDialog.js
@@ -9,6 +9,7 @@ const GLib = imports.gi.GLib;
 const GnomeDesktop = imports.gi.GnomeDesktop;
 const Gtk = imports.gi.Gtk;
 const Lang = imports.lang;
+const Meta = imports.gi.Meta;
 const Signals = imports.signals;
 const Shell = imports.gi.Shell;
 const St = imports.gi.St;
@@ -80,7 +81,7 @@ const UnlockDialog = new Lang.Class({
 
         Main.ctrlAltTabManager.addGroup(this.actor, _("Unlock Window"), 'dialog-password-symbolic');
 
-        this._idleMonitor = new GnomeDesktop.IdleMonitor();
+        this._idleMonitor = Meta.IdleMonitor.get_core();
         this._idleWatchId = this._idleMonitor.add_idle_watch(IDLE_TIMEOUT * 1000, Lang.bind(this, this._escape));
     },