diff --git a/user_guide/changelog.html b/user_guide/changelog.html
index 5106d10..2c20ce5 100644
--- a/user_guide/changelog.html
+++ b/user_guide/changelog.html
@@ -71,6 +71,7 @@
 	<li>Other changes
 		<ul>
 			<li>Improved performance and accuracy of xss_clean(), including reduction of false positives on image/file tests.</li>
+			<li>Added a few openxml document mime types, and an additional mobile agent to mimes.php and user_agents.php respectively.</li>
 		</ul>
 	</li>
 </ul>