diff --git a/source b/source
index 7289a9999c8..2b9eae7184e 100644
--- a/source
+++ b/source
@@ -13326,8 +13326,9 @@ Transport Protocol">HTTP&lt;/abbr> today.&lt;/p></code></pre> <!-- DO NOT REWRAP
    attribute in the <span>XML namespace</span></span> set</dt>
    <dd><p>Use the value of that attribute.</p></dd>
 
-   <dt>If the node is an <span data-x="HTML elements">HTML element</span> and has a <code
-   data-x="attr-lang">lang</code> in no namespace attribute set.</dt>
+   <dt>If the node is an <span data-x="HTML elements">HTML element</span> or an element in the
+   <span>SVG namespace</span>, and it has a <code data-x="attr-lang">lang</code> in no namespace
+   attribute set.</dt>
    <dd><p>Use the value of that attribute.</p></dd>
 
    <dt>If the node's parent is a <span>shadow root</span></dt>