diff --git a/index.html b/index.html
index e4b707fc..771f4bc8 100644
--- a/index.html
+++ b/index.html
@@ -4457,6 +4457,9 @@ <h2>
           of the user interface that could cause another update event to be
           fired.
           </li>
+          <li>Otherwise, set <var>event</var>.<a>[[\waitForUpdate]]</a> to
+          true.
+          </li>
         </ol>
       </section>
       <section>