diff --git a/wp-admin/admin-header.php b/wp-admin/admin-header.php
index 2c14a9225a..6f2d56b726 100644
--- a/wp-admin/admin-header.php
+++ b/wp-admin/admin-header.php
@@ -12,7 +12,7 @@ if ( ! defined( 'WP_ADMIN' ) )
 
 // In case admin-header.php is included in a function.
 global $title, $hook_suffix, $current_screen, $wp_locale, $pagenow, $wp_version, $is_iphone,
-	$user_identity, $current_site, $update_title, $total_update_count, $parent_file;
+	$current_site, $update_title, $total_update_count, $parent_file;
 
 get_admin_page_title();
 $title = esc_html( strip_tags( $title ) );
diff --git a/wp-includes/admin-bar.php b/wp-includes/admin-bar.php
index f7f74f1d10..daa9501885 100644
--- a/wp-includes/admin-bar.php
+++ b/wp-includes/admin-bar.php
@@ -134,16 +134,14 @@ function wp_admin_bar_wp_menu( $wp_admin_bar ) {
  * @since 3.1.0
  */
 function wp_admin_bar_my_account_menu( $wp_admin_bar ) {
-	global $user_identity;
-
 	$user_id      = get_current_user_id();
 	$current_user = wp_get_current_user();
 	$profile_url  = get_edit_profile_url( $user_id );
 
 	if ( 0 != $user_id ) {
-		/* Add the 'My Account' menu */
+		/* Add the "My Account" menu */
 		$avatar = get_avatar( $user_id, 28 );
-		$howdy  = sprintf( __('Howdy, %1$s'), $user_identity );
+		$howdy  = sprintf( __('Howdy, %1$s'), $current_user->display_name );
 		$class  = empty( $avatar ) ? '' : 'with-avatar';
 
 		$wp_admin_bar->add_menu( array(
diff --git a/wp-includes/comment-template.php b/wp-includes/comment-template.php
index f113122eff..25f73c3d90 100644
--- a/wp-includes/comment-template.php
+++ b/wp-includes/comment-template.php
@@ -1508,7 +1508,7 @@ function wp_list_comments($args = array(), $comments = null ) {
  * @return void
  */
 function comment_form( $args = array(), $post_id = null ) {
-	global $user_identity, $id;
+	global $id;
 
 	if ( null === $post_id )
 		$post_id = $id;
@@ -1516,6 +1516,8 @@ function comment_form( $args = array(), $post_id = null ) {
 		$id = $post_id;
 
 	$commenter = wp_get_current_commenter();
+	$user = wp_get_current_user();
+	$user_identity = ! empty( $user->ID ) ? $user->display_name : '';
 
 	$req = get_option( 'require_name_email' );
 	$aria_req = ( $req ? " aria-required='true'" : '' );