diff --git a/cake/libs/l10n.php b/cake/libs/l10n.php
index 95f66c257bd..7000a808b6d 100644
--- a/cake/libs/l10n.php
+++ b/cake/libs/l10n.php
@@ -393,7 +393,7 @@ function __setLanguage($language = null) {
  * @access private
  */
 	function __autoLanguage() {
-		$_detectableLanguages = split('[,;]', env('HTTP_ACCEPT_LANGUAGE'));
+		$_detectableLanguages = preg_split('/[,;]/', env('HTTP_ACCEPT_LANGUAGE'));
 		foreach ($_detectableLanguages as $key => $langKey) {
 			$langKey = strtolower($langKey);
 			if (strpos($langKey, '_') !== false) {