diff --git a/wp-admin/includes/class-wp-posts-list-table.php b/wp-admin/includes/class-wp-posts-list-table.php
index 35b2f17b33..07fd34defa 100644
--- a/wp-admin/includes/class-wp-posts-list-table.php
+++ b/wp-admin/includes/class-wp-posts-list-table.php
@@ -463,7 +463,7 @@ class WP_Posts_List_Table extends WP_List_Table {
 	}
 
 	function single_row( $a_post, $level = 0 ) {
-		global $post, $current_screen, $mode;
+		global $post, $mode;
 		static $alternate;
 
 		$global_post = $post;
diff --git a/wp-admin/includes/template.php b/wp-admin/includes/template.php
index 0ddaa788a6..d9a98095dc 100644
--- a/wp-admin/includes/template.php
+++ b/wp-admin/includes/template.php
@@ -1370,9 +1370,11 @@ function _admin_search_query() {
  */
 function iframe_header( $title = '', $limit_styles = false ) {
 	show_admin_bar( false );
-	global $hook_suffix, $current_screen, $current_user, $admin_body_class, $wp_locale;
+	global $hook_suffix, $current_user, $admin_body_class, $wp_locale;
 	$admin_body_class = preg_replace('/[^a-z0-9_-]+/i', '-', $hook_suffix);
 
+	$current_screen = get_current_screen();
+
 	_wp_admin_html_begin();
 ?>
 <title><?php bloginfo('name') ?> &rsaquo; <?php echo $title ?> &#8212; <?php _e('WordPress'); ?></title>