diff --git a/source b/source
index 6de62d1e183..46d5b7f9220 100644
--- a/source
+++ b/source
@@ -82120,8 +82120,8 @@ dictionary <dfn dictionary>DragEventInit</dfn> : <span>MouseEventInit</span> {
     </ol>
    </li>
 
-   <li><p>If <var>endpoint</var> is null, then run <var>closeAllOpenPopovers</var> and
-   return.</p></li>
+   <li><p>If <var>endpoint</var> is a <code>Document</code>, then run
+   <var>closeAllOpenPopovers</var> and return.</p></li>
 
    <li><p>Let <var>lastToHide</var> be null.</p></li>