Index: src/wp-admin/customize.php
===================================================================
--- src/wp-admin/customize.php	(revision 31483)
+++ src/wp-admin/customize.php	(working copy)
@@ -118,7 +118,7 @@
 <body class="<?php echo esc_attr( $body_class ); ?>">
 <div class="wp-full-overlay expanded">
 	<form id="customize-controls" class="wrap wp-full-overlay-sidebar">
-		<div id="screen-reader-messages" aria-live="polite" aria-relevant="all" aria-role="status" aria-atomic="true" class="screen-reader-text"></div>
+		<div id="screen-reader-messages" role="status" aria-live="polite" aria-relevant="all" aria-atomic="true" class="screen-reader-text"></div>
 
 		<div id="customize-header-actions" class="wp-full-overlay-header">
 			<?php
