diff --git a/booking.import_data.inc b/booking.import_data.inc
index fd3049e..6590e70 100644
--- a/booking.import_data.inc
+++ b/booking.import_data.inc
@@ -34,7 +34,7 @@ function booking_import_data_admin($form, &$form_state)
 			'Fields are sorted alphabetically.'),
 		'#options' => $select_array,
 		'#size' => 10,
-		'#default_value' => isset($form_state['input']['booking_import_data_fields']) ? $form_state['input']['booking_import_data_fields'] : array('nid'),
+		'#default_value' => isset($form_state['input']['booking_import_data_fields']) ? $form_state['input']['booking_import_data_fields'] : 'nid',
     //'#default_value' => variable_get('booking_import_include_fields_dynamic', ''),
   );