diff --git a/src/wp-admin/customize.php b/src/wp-admin/customize.php
index bfc96233eb..c19bdced3a 100644
--- a/src/wp-admin/customize.php
+++ b/src/wp-admin/customize.php
@@ -13,7 +13,11 @@ define( 'IFRAME_REQUEST', true );
 require_once( dirname( __FILE__ ) . '/admin.php' );
 
 if ( ! current_user_can( 'customize' ) ) {
-	wp_die( __( 'Cheatin’ uh?' ), 403 );
+	wp_die(
+		'<h1>' . __( 'Cheatin&#8217; uh?' ) . '</h1>' .
+		'<p>' . __( 'You are not allowed to customize the appearance of this site.' ) . '</p>',
+		403
+	);
 }
 
 wp_reset_vars( array( 'url', 'return' ) );