diff --git a/index.html b/index.html
index 4194ddf..767b764 100644
--- a/index.html
+++ b/index.html
@@ -557,7 +557,7 @@ <h2>
         by the string "<code>battery</code>". It's default allowlist is
         <code>'self'</code>. When disabled in a document, the
         <code><a>getBattery</a>()</code> method MUST return a <a>promise</a>
-        which rejects with a "<a>SecurityError</a>" <a>DOMException</a>.
+        which rejects with a "<a>NotAllowedError</a>" <a>DOMException</a>.
       </p>
     </section>
     <section class="informative">