diff --git a/lib/Cake/View/Helper.php b/lib/Cake/View/Helper.php
index e91299e73..35aefff44 100644
--- a/lib/Cake/View/Helper.php
+++ b/lib/Cake/View/Helper.php
@@ -145,9 +145,48 @@ class Helper extends Object {
  * @var array
  */
 	protected $_minimizedAttributes = array(
-		'compact', 'checked', 'declare', 'readonly', 'disabled', 'selected',
-		'defer', 'ismap', 'nohref', 'noshade', 'nowrap', 'multiple', 'noresize',
-		'autoplay', 'controls', 'loop', 'muted', 'required', 'novalidate', 'formnovalidate'
+		'allowfullscreen',
+		'async',
+		'autofocus',
+		'autoplay',
+		'checked',
+		'compact',
+		'controls',
+		'declare',
+		'default',
+		'defaultchecked',
+		'defaultmuted',
+		'defaultselected',
+		'defer',
+		'disabled',
+		'enabled',
+		'formnovalidate',
+		'hidden',
+		'indeterminate',
+		'inert',
+		'ismap',
+		'itemscope',
+		'loop',
+		'multiple',
+		'muted',
+		'nohref',
+		'noresize',
+		'noshade',
+		'novalidate',
+		'nowrap',
+		'open',
+		'pauseonexit',
+		'readonly',
+		'required',
+		'reversed',
+		'scoped',
+		'seamless',
+		'selected',
+		'sortable',
+		'spellcheck',
+		'truespeed',
+		'typemustmatch',
+		'visible'
 	);
 
 /**