diff --git a/www/extras/admin/admin.js b/www/extras/admin/admin.js
index b9c74f3fd..ba3e1242c 100644
--- a/www/extras/admin/admin.js
+++ b/www/extras/admin/admin.js
@@ -73,7 +73,7 @@ WebGUI.Admin.getRealHeight
 = function ( elem ) {
     var D = YAHOO.util.Dom;
     var _pos = D.getStyle(elem, 'position');
-    var _vis = D.getStyle(elem, 'visiblity');
+    var _vis = D.getStyle(elem, 'visibility');
     var clipped = false;
     // We don't want 0 height!
     if ( parseInt( elem.style.height ) == 0 ) {