diff --git a/theme/oceanblue/header.html b/theme/oceanblue/header.html
index 7a0023c4be4..e5fc7ded3ea 100644
--- a/theme/oceanblue/header.html
+++ b/theme/oceanblue/header.html
@@ -17,16 +17,17 @@
     
 <div id="page">
 
-<?php if ($home) {  // This is what gets printed on the home page only  
+<?php //Accessibility: 'headermain' is now H1, see theme/standard/styles_layout.css: .headermain
+      if ($home) {  // This is what gets printed on the home page only
 ?>
     <div id="header-home">
-        <div class="headermain"><?php echo $heading ?></div>
+        <h1 class="headermain"><?php echo $heading ?></h1>
         <div class="headermenu"><?php echo $menu ?></div>
     </div>
 <?php } else if ($heading) {  // This is what gets printed on any other page with a heading 
 ?>
     <div id="header">
-        <div class="headermain"><?php echo $heading ?></div>
+        <h1 class="headermain"><?php echo $heading ?></h1>
         <div class="headermenu"><?php echo $menu ?></div>
     </div>
 <?php } ?>