diff --git a/htdocs/adherents/class/adherent.class.php b/htdocs/adherents/class/adherent.class.php
index 1f01f608fb0..f5784b43fb2 100644
--- a/htdocs/adherents/class/adherent.class.php
+++ b/htdocs/adherents/class/adherent.class.php
@@ -656,6 +656,8 @@ class Adherent extends CommonObject
 	{
 		global $conf, $langs, $hookmanager;
 
+		require_once DOL_DOCUMENT_ROOT.'/core/lib/functions2.lib.php';
+
 		$nbrowsaffected = 0;
 		$error = 0;