diff --git a/platform/drupal/install_8.inc b/platform/drupal/install_8.inc
index a562c2d295e7c586b416eef19684451a1df5a869..0ed9674e9bc1c3bb0983cecd01277ede684e695c 100644
--- a/platform/drupal/install_8.inc
+++ b/platform/drupal/install_8.inc
@@ -22,7 +22,7 @@ function install_send_welcome_mail($url, $account, $language, $client_email, $on
       '!date' => format_date(time()), '!login_uri' => url('user', array('absolute' => TRUE)),
       '!edit_uri' => url('user/'. $account->uid .'/edit', array('absolute' => TRUE)));
 
-    $mail_success = drupal_mail('install', 'welcome-admin', $account->mail, user_preferred_language($account), $mail_params, $from, TRUE);
+    $mail_success = drupal_mail('install', 'welcome-admin', $account->mail, user_preferred_langcode($account), $mail_params, $from, TRUE);
 
     if ($mail_success) {
       drush_log(t('Sent welcome mail to @client', array('@client' => $client_email)), 'message');