diff --git a/source b/source
index 2aa7dc3615f..0c62380dbfa 100644
--- a/source
+++ b/source
@@ -111489,6 +111489,12 @@ document.body.appendChild(text);
     parser</span>.</p>
    </li>
 
+   <li>
+    <p>Bytes pushed into the HTML parser's <span>input byte stream</span> must also be pushed into
+    the speculative HTML parser's <span>input byte stream</span>. Bytes read from the streams must
+    be independent.</p>
+   </li>
+
    <li>
     <p>The result of the speculative parsing is primarily a series of <span>speculative
     fetches</span>. Which kinds of resources to speculatively fetch is