diff --git a/source b/source
index 68e04a85bda..f5d14f2c5a2 100644
--- a/source
+++ b/source
@@ -78061,8 +78061,11 @@ dictionary <dfn>DragEventInit</dfn> : <span>MouseEventInit</span> {
     realm</span> in <var>agent</var> with the following customizations:</p>
 
     <ul>
-     <li><p>For the global object, create a new <code>Window</code> object providing
-     <var>agent</var> as the global object's <span>agent</span>.</p></li>
+     <li><p>For the agent, use <var>agent</var>. <span class="XXX">This pointer is not yet defined
+     in the JavaScript specification; see <a
+     href="https://github.com/tc39/ecma262/issues/1357">tc39/ecma262#1357</a>.</span></p></li>
+
+     <li><p>For the global object, create a new <code>Window</code> object.</p></li>
 
      <li><p>For the global <b>this</b> binding, use <var>browsingContext</var>'s
      <code>WindowProxy</code> object.</li>