diff --git a/system/application/config/database.php b/system/application/config/database.php
index 8a1822e..082e34a 100644
--- a/system/application/config/database.php
+++ b/system/application/config/database.php
@@ -23,6 +23,8 @@
| ['pconnect'] TRUE/FALSE - Whether to use a persistent connection
| ['db_debug'] TRUE/FALSE - Whether database errors should be displayed.
| ['active_r'] TRUE/FALSE - Whether to load the active record class
+| ['cache_on'] TRUE/FALSE - Enables/disables query caching
+| ['cachedir'] The path to the folder where cache files should be stored
|
| The $active_group variable lets you choose which connection group to
| make active. By default there is only one group (the "default" group).