guide example fix for form_hidden
diff --git a/user_guide/changelog.html b/user_guide/changelog.html
index 0d6e3ef..b2c7b99 100644
--- a/user_guide/changelog.html
+++ b/user_guide/changelog.html
@@ -79,7 +79,7 @@
<h3>Bug fixes for 1.6.4</h3>
<ul>
<li>Fixed bug in xss_clean() that could remove some desirable tag attributes.</li>
- <li>Fixed assorted user guide typos or examples (#4840, #4862, #4864).</li>
+ <li>Fixed assorted user guide typos or examples (#4840, #4862, #4864, #4899).</li>
</ul>
<h2>Version 1.6.3</h2>