diff --git a/source b/source
index 8a22e36a4e7..90829546f9d 100644
--- a/source
+++ b/source
@@ -61556,6 +61556,8 @@ interface <dfn interface>HTMLDialogElement</dfn> : <span>HTMLElement</span> {
    <li><p>If <var>removedNode</var>'s <span>node document</span>'s <span>top layer</span> <span
    data-x="list contains">contains</span> <var>removedNode</var>, then <span>remove an element from
    the top layer immediately</span> given <var>removedNode</var>.</p></li>
+
+   <li><p>Set the <span>is modal</span> flag of <var>removedNode</var> to false.</p></li>
   </ol>
 
   <p>The <dfn method for="HTMLDialogElement"><code