diff --git a/lib/Twig/Autoloader.php b/lib/Twig/Autoloader.php
index d1e005b11..736605d79 100644
--- a/lib/Twig/Autoloader.php
+++ b/lib/Twig/Autoloader.php
@@ -18,11 +18,17 @@ class Twig_Autoloader
 {
     /**
      * Registers Twig_Autoloader as an SPL autoloader.
+     *
+     * @param Bolean $prepend Whether to prepend the autoloader or not.
      */
-    public static function register()
+    public static function register($prepend = false)
     {
         ini_set('unserialize_callback_func', 'spl_autoload_call');
-        spl_autoload_register(array(new self, 'autoload'));
+        if ($prepend && version_compare(phpversion(), '5.3.0RC1', '>=')) {
+            spl_autoload_register(array(new self, 'autoload'), true, $prepend);
+        } else {
+            spl_autoload_register(array(new self, 'autoload'), true);
+        }
     }
 
     /**
diff --git a/test/bootstrap.php b/test/bootstrap.php
index 36eb46af6..aecb976f7 100644
--- a/test/bootstrap.php
+++ b/test/bootstrap.php
@@ -10,4 +10,4 @@
  */
 
 require_once dirname(__FILE__).'/../lib/Twig/Autoloader.php';
-Twig_Autoloader::register();
+Twig_Autoloader::register(true);