diff --git a/user_guide/libraries/config.html b/user_guide/libraries/config.html
index bdabe8d..6367e2e 100644
--- a/user_guide/libraries/config.html
+++ b/user_guide/libraries/config.html
@@ -144,7 +144,7 @@
 
 <h2>Setting a Config Item</h2>
 
-<p>If you would like to dynamically set a config item or change an existing one, you can so using:</p>
+<p>If you would like to dynamically set a config item or change an existing one, you can do so using:</p>
 
 <code>$this->config->set_item('<var>item_name</var>', '<var>item_value</var>');</code>