diff --git a/modules/field_ui/field_ui.admin.inc b/modules/field_ui/field_ui.admin.inc
index 34dafb1da9ab857ced515418ee5099919fba0fa1..05102daa110a14b916d748fdbd5de4b9d111a77e 100644
--- a/modules/field_ui/field_ui.admin.inc
+++ b/modules/field_ui/field_ui.admin.inc
@@ -1285,7 +1285,7 @@ function field_ui_field_edit_form_submit($form, &$form_state) {
 
   // Move the default value from the sample widget to the default value field.
   if (isset($instance_values['default_value_widget'])) {
-    $langcode = $instance_values['default_value_widget'][$field_name]['#language'];
+    $langcode = $form['instance']['default_value_widget'][$field_name]['#language'];
     $instance_values['default_value'] = $instance_values['default_value_widget'][$field_name][$langcode];
     unset($instance_values['default_value_widget']);
   }