diff --git a/getusermedia.html b/getusermedia.html
index 6069fa26..672014c5 100644
--- a/getusermedia.html
+++ b/getusermedia.html
@@ -651,6 +651,9 @@ <h2>{{MediaStreamTrack}}</h2>
                  data-link-type="attribute">[[\Settings]]</a>, all initialized as
               specified in the {{ConstrainablePattern}}.</p>
             </li>
+            <li>
+              <p><dfn class="export">[[\Restrictable]]</dfn>, initialized to <code>false</code>.</p>
+            </li>
           </ul>
         </li>
         <li>