diff --git a/fullscreen.bs b/fullscreen.bs
index b818d24..12698f8 100644
--- a/fullscreen.bs
+++ b/fullscreen.bs
@@ -246,6 +246,8 @@ these steps:
    <a href=https://www.w3.org/Math/draft-spec/chapter2.html#interf.toplevel>MathML <code>math</code></a>
    element. [[!SVG]] [[!MATHML]]
 
+   <li><p><var>pending</var> is not a <{dialog}> element.
+
    <li><p>The <a>fullscreen element ready check</a> for <var>pending</var> returns true.
 
    <li><p><a>Fullscreen is supported</a>.