diff --git a/core/includes/install.core.inc b/core/includes/install.core.inc
index f53b788..c22165b 100644
--- a/core/includes/install.core.inc
+++ b/core/includes/install.core.inc
@@ -2737,6 +2737,7 @@ function install_configure_form_submit($form, &$form_state) {
   $account->timezone = $form_state['values']['date_default_timezone'];
   $account->pass = $form_state['values']['account']['pass'];
   $account->name = $form_state['values']['account']['name'];
+  $account->langcode = language_default()->id;
   $account->save();
   // Load global $user and perform final login tasks.
   $account = user_load(1);