diff --git a/user_guide/installation/upgrade_140.html b/user_guide/installation/upgrade_140.html
index 1c72b5d..9bd0923 100644
--- a/user_guide/installation/upgrade_140.html
+++ b/user_guide/installation/upgrade_140.html
@@ -76,6 +76,7 @@
 <p class="important"><strong>Note:</strong> If you have any custom developed files in these folders please make copies of them first.</p>
 
 <ul>
+<li>application/config/<strong>hooks.php</strong></li>
 <li>application/config/<strong>mimes.php</strong></li>
 <li>codeigniter</li>
 <li>drivers</li>