diff --git a/user_guide/changelog.html b/user_guide/changelog.html
index 851ec7a..351e1e8 100644
--- a/user_guide/changelog.html
+++ b/user_guide/changelog.html
@@ -114,6 +114,7 @@
 	<li>Fixed DB Driver and MySQLi result driver checking for resources instead of objects (#3461).</li>
 	<li>Fixed an incorrect documentation of $this-&gt;load-&gt;language (#3520).</li>
 	<li>Fixed an AR_caching error where it wasn't tracking table aliases (#3463).</li>
+	<li>Fixed an AR bug with or_where_not_in() (#4171).</li>
 	<li>Fixed an AR bug when joining with a table alias and table prefix (#4400).</li>
 	<li>Fixed a bug in DB Forge, when inserting an id field (#3456).</li>
 	<li>Fixed a bug in the DB class testing the $params argument.</li>