diff --git a/source b/source
index 643f67b15b9..b9e0993be19 100644
--- a/source
+++ b/source
@@ -91080,7 +91080,8 @@ document.body.appendChild(frame)</code></pre>
    </li>
 
    <li>
-    <p>If there is an existing attempt to <span>navigate</span> <var>document</var>'s <span
+    <p>If <var>document</var> has a <span data-x="concept-document-bc">browsing context</span> and
+    there is an existing attempt to <span>navigate</span> <var>document</var>'s <span
     data-x="concept-document-bc">browsing context</span>, then <span>stop document loading</span>
     given <var>document</var>.</p>