diff --git a/include/class/follow_up.class.php b/include/class/follow_up.class.php
index 29164ce8d..64f86c9cb 100644
--- a/include/class/follow_up.class.php
+++ b/include/class/follow_up.class.php
@@ -39,6 +39,8 @@ require_once NOALYSS_INCLUDE.'/lib/irelated_action.class.php';
 require_once NOALYSS_INCLUDE.'/class/tag.class.php';
 require_once NOALYSS_INCLUDE.'/class/default_menu.class.php';
 require_once NOALYSS_INCLUDE.'/lib/inplace_edit.class.php';
+require_once NOALYSS_INCLUDE.'/lib/noalyss_csv.class.php';
+
 /**
  * \file
  * \brief class_action for manipulating actions