diff --git a/user_guide/installation/upgrade_152.html b/user_guide/installation/upgrade_152.html
index 730b6f3..947cd71 100644
--- a/user_guide/installation/upgrade_152.html
+++ b/user_guide/installation/upgrade_152.html
@@ -86,6 +86,7 @@
 <li><dfn>system/libraries/Image_lib.php</dfn></li>
 <li><dfn>system/language/english/unit_test_lang.php</dfn></li>
 <li><dfn>system/database/DB_active_rec.php</dfn></li>
+<li><dfn> system/database/drivers/mysqli/mysqli_driver.php</dfn></li>
 <li><dfn>codeigniter/</dfn></li>
 </ul>