diff --git a/system/application/config/config.php b/system/application/config/config.php
index a02fed1..72d3819 100644
--- a/system/application/config/config.php
+++ b/system/application/config/config.php
@@ -123,7 +123,7 @@
 | DO NOT CHANGE THIS UNLESS YOU FULLY UNDERSTAND THE REPERCUSSIONS!!
 |
 */
-$config['permitted_uri_chars'] = 'a-z 0-9~%.:_-';
+$config['permitted_uri_chars'] = 'a-z 0-9~%.:_\-';
 
 
 /*