diff --git a/source b/source
index 6b81c39c443..4d968bbfea0 100644
--- a/source
+++ b/source
@@ -110167,7 +110167,7 @@ if (s = prompt('What is your name?')) {
   attribute, which for the purposes of reflection is defined as containing a <span>URL</span>.</p>
 
 
-  <h4>The <dfn><code>marquee</code></dfn> element</h4>
+  <h4 id="the-marquee-element">The <dfn><code>marquee</code></dfn> element</h4>
 
   <p>The <code>marquee</code> element is a presentational element that animates content. CSS
   transitions and animations are a more appropriate mechanism. <ref spec=CSSANIMATIONS> <ref spec=CSSTRANSITIONS></p>