diff --git a/system/core/CodeIgniter.php b/system/core/CodeIgniter.php
index 1c6e76b..3e1280b 100644
--- a/system/core/CodeIgniter.php
+++ b/system/core/CodeIgniter.php
@@ -249,7 +249,7 @@
 	require_once(BASEPATH.'core/compat/mbstring.php');
 	require_once(BASEPATH.'core/compat/hash.php');
 	require_once(BASEPATH.'core/compat/password.php');
-	require_once(BASEPATH.'core/compat/array.php');
+	require_once(BASEPATH.'core/compat/standard.php');
 
 /*
  * ------------------------------------------------------
diff --git a/system/core/compat/array.php b/system/core/compat/standard.php
similarity index 83%
rename from system/core/compat/array.php
rename to system/core/compat/standard.php
index 07dae21..6380fa1 100644
--- a/system/core/compat/array.php
+++ b/system/core/compat/standard.php
@@ -27,14 +27,13 @@
 defined('BASEPATH') OR exit('No direct script access allowed');
 
 /**
- * PHP ext/standard/array compatibility package
+ * PHP ext/standard compatibility package
  *
  * @package		CodeIgniter
  * @subpackage	CodeIgniter
  * @category	Compatibility
  * @author		Andrey Andreev
  * @link		http://codeigniter.com/user_guide/
- * @link		http://php.net/book.array
  */
 
 // ------------------------------------------------------------------------
@@ -125,6 +124,54 @@
 
 // ------------------------------------------------------------------------
 
+if (is_php('5.4'))
+{
+	return;
+}
+
+// ------------------------------------------------------------------------
+
+if ( ! function_exists('hex2bin'))
+{
+	/**
+	 * hex2bin()
+	 *
+	 * @link	http://php.net/hex2bin
+	 * @param	string	$data
+	 * @return	string
+	 */
+	function hex2bin($data)
+	{
+		if (in_array($type = gettype($data), array('array', 'double', 'object'), TRUE))
+		{
+			if ($type === 'object' && method_exists($data, '__toString'))
+			{
+				$data = (string) $data;
+			}
+			else
+			{
+				trigger_error('hex2bin() expects parameter 1 to be string, '.$type.' given', E_USER_WARNING);
+				return NULL;
+			}
+		}
+
+		if (strlen($data) % 2 !== 0)
+		{
+			trigger_error('Hexadecimal input string must have an even length', E_USER_WARNING);
+			return FALSE;
+		}
+		elseif ( ! preg_match('/^[0-9a-f]*$/i', $data))
+		{
+			trigger_error('Input string must be hexadecimal string', E_USER_WARNING);
+			return FALSE;
+		}
+
+		return pack('H*', $data);
+	}
+}
+
+// ------------------------------------------------------------------------
+
 if (is_php('5.3'))
 {
 	return;