diff --git a/user_guide/changelog.html b/user_guide/changelog.html
index c66ff23..cb9a370 100644
--- a/user_guide/changelog.html
+++ b/user_guide/changelog.html
@@ -95,6 +95,7 @@
 			<li>Added 'application/msexcel' to config/mimes.php for .xls files.</li>
 			<li>Added 'proxy_ips' config item to whitelist reverse proxy servers from which to trust the HTTP_X_FORWARDED_FOR header to
 				to determine the visitor's IP address.</li>
+			<li>Improved accuracy of Upload::is_allowed_filetype() for images (#6715)</li>
 		</ul>
 	</li>
 </ul>