diff --git a/phpseclib/File/X509.php b/phpseclib/File/X509.php
index 8f966754..34dbafad 100644
--- a/phpseclib/File/X509.php
+++ b/phpseclib/File/X509.php
@@ -3758,7 +3758,7 @@ class File_X509
      * @param string $path  absolute path with / as component separator
      * @param bool $create optional
      * @access private
-     * @return mixed
+     * @return array|false
      */
     function &_subArray(&$root, $path, $create = false)
     {