diff --git a/js/ui/screenShield.js b/js/ui/screenShield.js
index c6202feca..8918910f8 100644
--- a/js/ui/screenShield.js
+++ b/js/ui/screenShield.js
@@ -847,6 +847,7 @@ const ScreenShield = new Lang.Class({
     },
 
     _activateFade: function(lightbox, time) {
+        Main.uiGroup.set_child_above_sibling(lightbox.actor, null);
         lightbox.show(time);
 
         if (this._becameActiveId == 0)