diff --git a/user_guide/changelog.html b/user_guide/changelog.html
index a1afab1..7a0a251 100644
--- a/user_guide/changelog.html
+++ b/user_guide/changelog.html
@@ -112,6 +112,7 @@
 	<li>Modified XSS sanitization to no longer add semicolons after &amp;[single letter], such as in M&amp;M's, B&amp;B, etc.</li>
 	<li>Modified XSS sanitization to no longer strip XHTML image tags of closing slashes.</li>
 	<li>Fixed a bug in the Session class when database sessions are used where upon session update all userdata would be errantly written to the session cookie.</li>
+	<li>Fixed a bug (#4536) in backups with the MySQL driver where some legacy code was causing certain characters to be double escaped.</li>
 </ul>
 
 <h2>Version 1.6.3</h2>