diff --git a/user_guide/changelog.html b/user_guide/changelog.html
index a924edc..4c4e670 100644
--- a/user_guide/changelog.html
+++ b/user_guide/changelog.html
@@ -80,6 +80,7 @@
 	<li>Helpers
 		<ul>
 			<li>Added an optional third parameter to <samp>heading()</samp> which allows adding html attributes to the rendered heading tag.</li>
+			<li class="reactor"><kbd>form_open()</kbd> now only adds a hidden (Cross-site Reference Forgery) protection field when the form's action is internal and is set to the post method. (Reactor #165)</li>
 		</ul>
 	</li>
 	<li>Libraries