Another typo...
diff --git a/system/helpers/file_helper.php b/system/helpers/file_helper.php
index 7270ee3..3834d48 100644
--- a/system/helpers/file_helper.php
+++ b/system/helpers/file_helper.php
@@ -32,7 +32,7 @@
* @subpackage Helpers
* @category Helpers
* @author EllisLab Dev Team
- * @link http://codeigniter.com/user_guide/helpers/file_helpers.html
+ * @link http://codeigniter.com/user_guide/helpers/file_helper.html
*/
// ------------------------------------------------------------------------