diff --git a/developer/topics/forms_api_reference.html b/developer/topics/forms_api_reference.html
index 15fa006..391d2b9 100644
--- a/developer/topics/forms_api_reference.html
+++ b/developer/topics/forms_api_reference.html
@@ -51,7 +51,7 @@ For more extensive information about the Form API, see the
 <a href="http://drupal.org/node/37775">Form API handbook</a>.</p>
 
 <p>Skip to: <a href="#properties">Properties</a> | <a href="#element_default_values">Default Values</a> | <a href="#elements">Elements</a></p>
-<p>Note that internal properties are not included in the table below, but are included in the Properties list. These include: <a href="#built">#built</a>, <a href="#children">#children</a>, <a href="#error">#error</a>, <a href="#id">#id</a>, <a href="#input">#input</a>, <a href="#printed">#printed</a>, <a href="#validation">#validation_arguments</a>
+<p>Note that internal properties are not included in the table below, but are included in the Properties list. These include: <a href="#built">#built</a>, <a href="#children">#children</a>, <a href="#error">#error</a>, <a href="#id">#id</a>, <a href="#input">#input</a>, <a href="#printed">#printed</a>, <a href="#render_children">#render_children</a>, <a href="#validation">#validation_arguments</a>
 
 <h2>Form Controls</h2>
 
@@ -3783,6 +3783,11 @@ expands a radios element into individual radio buttons.
 whether or not a form element has been
 processed (ie: expanded to multiple elements).</p>
 
+<h3><a name="render_children" id="render_children">#render_children</a></h3>
+
+<p>INTERNAL. Used to prevent infinite recursion when calling drupal_render() on
+a render element.</p>
+
 <h3><a name="required" id="required">#required</a></h3>
 
 <p><strong>Used by</strong>: <a href="#checkbox">checkbox</a>, <a href="#checkboxes">checkboxes</a>, <a href="#date">date</a>, <a href="#file">file</a>, <a href="#password">password</a>,
