diff --git a/dom.bs b/dom.bs
index 32c0b71c..f120920a 100644
--- a/dom.bs
+++ b/dom.bs
@@ -10397,18 +10397,23 @@ object <var>walker</var> and "<code>next</code>" or "<code>previous</code>" <var
 
      <li><p>Set <var>sibling</var> to <var>temporary</var>'s <a for=tree>next sibling</a>.
 
-     <li><p>If <var>sibling</var> is non-null, then set <var>node</var> to <var>sibling</var> and
-     <a for=iteration>break</a>.
+     <li><p>If <var>sibling</var> is non-null, then <a for=iteration>break</a>.
 
      <li><p>Set <var>temporary</var> to <var>temporary</var>'s <a for=tree>parent</a>.
     </ol>
 
+   <li><p>If <var>sibling</var> is null, then <a for=iteration>break</a>.
+
+   <li><p>Set <var>node</var> to <var>sibling</var>.
+
    <li><p>Set <var>result</var> to the result of <a for=/>filtering</a> <var>node</var> within
    <a>this</a>.
 
    <li><p>If <var>result</var> is {{NodeFilter/FILTER_ACCEPT}}, then set <a>this</a>'s
    <a for=TreeWalker>current</a> to <var>node</var> and return <var>node</var>.
   </ol>
+
+ <li><p>Return null.
 </ol>
 </div>