diff --git a/source/Ox.UI/js/Window/Layer.js b/source/Ox.UI/js/Window/Layer.js
index 80487170..2ab9ac7e 100644
--- a/source/Ox.UI/js/Window/Layer.js
+++ b/source/Ox.UI/js/Window/Layer.js
@@ -28,7 +28,7 @@ Ox.Layer = function(options, self) {
     }
 
     function mousedown() {
-        that.stop().animate({opacity: 0.5}, 0);
+        that.stop().css({opacity: 0.5});
     }
 
     function mouseup() {