diff --git a/wp-admin/admin-ajax.php b/wp-admin/admin-ajax.php
index adb7e4a826..9e146629c3 100644
--- a/wp-admin/admin-ajax.php
+++ b/wp-admin/admin-ajax.php
@@ -16,6 +16,7 @@ define('WP_ADMIN', true);
 
 require_once('../wp-load.php');
 require_once('includes/admin.php');
+@header('Content-Type: text/html; charset=' . get_option('blog_charset'));
 
 if ( ! is_user_logged_in() ) {
 
diff --git a/wp-admin/press-this.php b/wp-admin/press-this.php
index c28ead14eb..a668b1beec 100644
--- a/wp-admin/press-this.php
+++ b/wp-admin/press-this.php
@@ -8,6 +8,7 @@
 
 /** WordPress Administration Bootstrap */
 require_once('admin.php');
+header('Content-Type: ' . get_option('html_type') . '; charset=' . get_option('blog_charset'));
 
 if ( ! current_user_can('publish_posts') ) wp_die( __( 'Cheatin’ uh?' ) );