diff --git a/source b/source
index 830273e8dc5..4bd72252b2d 100644
--- a/source
+++ b/source
@@ -56989,8 +56989,8 @@ interface <dfn interface>HTMLOptionElement</dfn> : <span>HTMLElement</span> {
    present, then return true.</p></li>
 
    <li>
-    <p>For each <var>ancestor</var> of <var>insertedOption</var>'s <span
-    data-x="ancestor">ancestors</span> in reverse <span>tree order</span>:</p>
+    <p>For each <var>ancestor</var> of <var>option</var>'s <span data-x="ancestor">ancestors</span>
+    in reverse <span>tree order</span>:</p>
 
     <ol>
      <li><p>If <var>ancestor</var> is a <code>select</code>, <code>hr</code>, or <code>option</code>