diff --git a/view/omeka/site/page/show.phtml b/view/omeka/site/page/show.phtml
index bcc390a..02f1d6b 100644
--- a/view/omeka/site/page/show.phtml
+++ b/view/omeka/site/page/show.phtml
@@ -65,7 +65,7 @@ if ($activePage):
     <?php if ($this->displayNavigation && $activePage['page']->hasPages()): ?>
     <nav class="sub-menu wide" data-sticky-container>
         <div class="sticky" data-sticky data-anchor="blocks">
-            <?php echo $nav->menu()->setUlClass('vertical menu')->renderSubMenu(); ?>
+            <?php echo $nav->menu()->setUlClass('horizontal menu')->renderSubMenu(); ?>
         </div>
     </nav>
     <?php endif; ?>