diff --git a/dom.bs b/dom.bs
index 4f4a767a1..55b73944d 100644
--- a/dom.bs
+++ b/dom.bs
@@ -5390,6 +5390,11 @@ are:
 <ol>
  <li><p>Let <var>constructor</var> be null.
 
+ <li>
+  <p>If <var>interface</var> is an <a>ASCII case-insensitive</a> match for "<code>touchevent</code>"
+  and the user agent's <a>expose legacy touch event APIs</a> is false, then <a>throw</a> a
+  "{{NotSupportedError!!exception}}" {{DOMException}}.
+
  <li>
   <p>If <var>interface</var> is an <a>ASCII case-insensitive</a> match for any of the strings in the
   first column in the following table, then set <var>constructor</var> to the interface in the