diff --git a/formatters4nodereference.module b/formatters4nodereference.module
index edd0122..e8b03b9 100644
--- a/formatters4nodereference.module
+++ b/formatters4nodereference.module
@@ -62,6 +62,11 @@ function formatters4nodereference_field_formatter_settings_form($field, $instanc
       ),
     );
 
+    // Ensure the Field UI module is loaded.
+    if (!function_exists('field_ui_formatter_options')) {
+      module_load_include('inc', 'field_ui', 'field_ui.admin');
+    }
+
     // Formatter.
     $field_identifier = isset($form_state['input']['fields'][$field['field_name']]['settings_edit_form'])
       ? $form_state['input']['fields'][$field['field_name']]['settings_edit_form']['settings']['data']['field']