diff --git a/theme/cornflower/header.html b/theme/cornflower/header.html
index bf237a64b7b..2a4bac8d44d 100644
--- a/theme/cornflower/header.html
+++ b/theme/cornflower/header.html
@@ -17,15 +17,17 @@
 <div class="cornflowersurround">
 <div id="page">
 
-<?php if ($home) {  // home page ?>
+<?php //Accessibility: warning: ALT text will need editing when logo changes. 'headermain' is now H1.
+
+      if ($home) {  // home page ?>
     <div id="header-home">
-        <div class="headermain"><img alt="" src="<?php echo $CFG->wwwroot.'/theme/'.current_theme() ?>/images/logo.jpg" width="457" height="64" /></div>
+        <h1 class="headermain"><img alt="[ REPLACE ME ]" src="<?php echo $CFG->wwwroot.'/theme/'.current_theme() ?>/images/logo.jpg" width="457" height="64" /></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-home">
-        <div class="headermain"><img alt="" src="<?php echo $CFG->wwwroot.'/theme/'.current_theme() ?>/images/logo.jpg" width="457" height="64" /></div>
+        <h1 class="headermain"><img alt="[ REPLACE ME ]" src="<?php echo $CFG->wwwroot.'/theme/'.current_theme() ?>/images/logo.jpg" width="457" height="64" /></h1>
         <div class="headermenu"><?php echo $menu ?></div>
     </div>
     <div class="clearer"></div>
diff --git a/theme/metal/header.html b/theme/metal/header.html
index a6aee9c6bf0..b66ae33f164 100644
--- a/theme/metal/header.html
+++ b/theme/metal/header.html
@@ -20,13 +20,13 @@
 <?php if ($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 $menu ?></div>
     </div>
 <?php } ?>
diff --git a/theme/orangewhite/header.html b/theme/orangewhite/header.html
index 85c5518fd2c..57ea9c517cf 100644
--- a/theme/orangewhite/header.html
+++ b/theme/orangewhite/header.html
@@ -20,7 +20,7 @@
 <?php if ($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 $menu ?></div>
     </div>
     <div class="navbar">
@@ -28,7 +28,7 @@
 <?php } else if ($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 class="headermenu"><div id="new-menu"><?php echo $navmenulist ?></div></div> -->
     </div>
diff --git a/theme/orangewhitepda/header.html b/theme/orangewhitepda/header.html
index 85c5518fd2c..57ea9c517cf 100644
--- a/theme/orangewhitepda/header.html
+++ b/theme/orangewhitepda/header.html
@@ -20,7 +20,7 @@
 <?php if ($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 $menu ?></div>
     </div>
     <div class="navbar">
@@ -28,7 +28,7 @@
 <?php } else if ($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 class="headermenu"><div id="new-menu"><?php echo $navmenulist ?></div></div> -->
     </div>