diff --git a/modules/book/book-node-export-html.tpl.php b/modules/book/book-node-export-html.tpl.php
index ef6c322..ed26a5b 100644
--- a/core/modules/book/book-node-export-html.tpl.php
+++ b/core/modules/book/book-node-export-html.tpl.php
@@ -17,8 +17,8 @@
  * @see template_preprocess_book_node_export_html()
  */
 ?>
-<div id="node-<?php print $node->nid; ?>" class="section-<?php print $depth; ?>">
+<article id="node-<?php print $node->nid; ?>" class="section-<?php print $depth; ?>">
   <h1 class="book-heading"><?php print $title; ?></h1>
   <?php print $content; ?>
   <?php print $children; ?>
-</div>
+</article>