diff --git a/src/wp-admin/includes/export.php b/src/wp-admin/includes/export.php
index ffabf52669..1c03e10b18 100644
--- a/src/wp-admin/includes/export.php
+++ b/src/wp-admin/includes/export.php
@@ -274,8 +274,8 @@ function export_wp( $args = array() ) {
 			echo '<wp:author_login>' . $author->user_login . '</wp:author_login>';
 			echo '<wp:author_email>' . $author->user_email . '</wp:author_email>';
 			echo '<wp:author_display_name>' . wxr_cdata( $author->display_name ) . '</wp:author_display_name>';
-			echo '<wp:author_first_name>' . wxr_cdata( $author->user_firstname ) . '</wp:author_first_name>';
-			echo '<wp:author_last_name>' . wxr_cdata( $author->user_lastname ) . '</wp:author_last_name>';
+			echo '<wp:author_first_name>' . wxr_cdata( $author->first_name ) . '</wp:author_first_name>';
+			echo '<wp:author_last_name>' . wxr_cdata( $author->last_name ) . '</wp:author_last_name>';
 			echo "</wp:author>\n";
 		}
 	}
diff --git a/src/wp-includes/class-wp-user.php b/src/wp-includes/class-wp-user.php
index d0bcb6538e..4005a6edc4 100644
--- a/src/wp-includes/class-wp-user.php
+++ b/src/wp-includes/class-wp-user.php
@@ -7,8 +7,11 @@
  * @subpackage User
  *
  * @property string $nickname
+ * @property string $description
  * @property string $user_description
+ * @property string $first_name
  * @property string $user_firstname
+ * @property string $last_name
  * @property string $user_lastname
  * @property string $user_login
  * @property string $user_pass