diff --git a/includes/menu.inc b/includes/menu.inc
index dba3b3ce76aef02d8ecb048e29659812be234033..0119fb5b80bace0e20961579c4e229c8550b17c6 100644
--- a/includes/menu.inc
+++ b/includes/menu.inc
@@ -2053,12 +2053,12 @@ function theme_menu_local_tasks() {
   $output = array();
 
   if ($primary = menu_primary_local_tasks()) {
-    $primary['#prefix'] = '<ul class="tabs primary">';
+    $primary['#prefix'] = '<h2 class="element-invisible">' . t('Primary tabs') . '</h2><ul class="tabs primary">';
     $primary['#suffix'] = '</ul>';
     $output[] = $primary;
   }
   if ($secondary = menu_secondary_local_tasks()) {
-    $secondary['#prefix'] = '<ul class="tabs secondary">';
+    $secondary['#prefix'] = '<h2 class="element-invisible">' . t('Secondary tabs') . '</h2><ul class="tabs secondary">';
     $secondary['#suffix'] = '</ul>';
     $output[] = $secondary;
   }
diff --git a/modules/overlay/overlay.tpl.php b/modules/overlay/overlay.tpl.php
index b475dee99fc3653dfb32f59c368de09c6294ff6d..d6d9e1c5912b739eabd5494a833d3dd53c55d028 100644
--- a/modules/overlay/overlay.tpl.php
+++ b/modules/overlay/overlay.tpl.php
@@ -29,7 +29,7 @@
     <div id="overlay-close-wrapper">
       <a id="overlay-close" href="#" class="overlay-close"><span class="element-invisible"><?php print t('Close overlay'); ?></span></a>
     </div>
-    <?php if ($tabs): ?><ul id="overlay-tabs"><?php print render($tabs); ?></ul><?php endif; ?>
+    <?php if ($tabs): ?><h2 class="element-invisible"><?php print t('Primary tabs'); ?></h2><ul id="overlay-tabs"><?php print render($tabs); ?></ul><?php endif; ?>
   </div>
   <div id="overlay-content"<?php print $content_attributes; ?>>
     <?php print $page; ?>
diff --git a/themes/garland/page.tpl.php b/themes/garland/page.tpl.php
index a9d86f0d805da767d0bb1c18a2530422e321c331..6dc50c2d59732120b952c769e39f572567ce3c27 100644
--- a/themes/garland/page.tpl.php
+++ b/themes/garland/page.tpl.php
@@ -47,8 +47,8 @@
             <h1<?php print $tabs ? ' class="with-tabs"' : '' ?>><?php print $title ?></h1>
           <?php endif; ?>
           <?php print render($title_suffix); ?>
-          <?php if ($tabs): ?><ul class="tabs primary"><?php print render($tabs) ?></ul></div><?php endif; ?>
-          <?php if ($tabs2): ?><ul class="tabs secondary"><?php print render($tabs2) ?></ul><?php endif; ?>
+          <?php if ($tabs): ?><h2 class="element-invisible"><?php print t('Primary tabs'); ?></h2><ul class="tabs primary"><?php print render($tabs) ?></ul></div><?php endif; ?>
+          <?php if ($tabs2): ?><h2 class="element-invisible"><?php print t('Secondary tabs'); ?></h2><ul class="tabs secondary"><?php print render($tabs2) ?></ul><?php endif; ?>
           <?php print $messages; ?>
           <?php print render($page['help']); ?>
           <?php if ($action_links): ?><ul class="action-links"><?php print render($action_links); ?></ul><?php endif; ?>
diff --git a/themes/seven/page.tpl.php b/themes/seven/page.tpl.php
index 962bf786825d6c05a9dd287774ee53d0963436d3..430f83ccbefdda0c2297e7a9cf584f5f6be781a2 100644
--- a/themes/seven/page.tpl.php
+++ b/themes/seven/page.tpl.php
@@ -9,11 +9,17 @@
       <h1 class="page-title"><?php print $title; ?></h1>
     <?php endif; ?>
     <?php print render($title_suffix); ?>
-    <?php if ($primary_local_tasks): ?><ul class="tabs primary"><?php print render($primary_local_tasks); ?></ul><?php endif; ?>
+    <?php if ($primary_local_tasks): ?>
+      <h2 class="element-invisible"><?php print t('Primary tabs'); ?></h2>
+      <ul class="tabs primary"><?php print render($primary_local_tasks); ?></ul>
+    <?php endif; ?>
   </div>
 
   <div id="page">
-    <?php if ($secondary_local_tasks): ?><ul class="tabs secondary"><?php print render($secondary_local_tasks); ?></ul><?php endif; ?>
+    <?php if ($secondary_local_tasks): ?>
+      <h2 class="element-invisible"><?php print t('Secondary tabs'); ?></h2>
+      <ul class="tabs secondary"><?php print render($secondary_local_tasks); ?></ul>
+    <?php endif; ?>
 
     <div id="content" class="clearfix">
       <?php if ($messages): ?>