diff --git a/htdocs/contact.class.php b/htdocs/contact.class.php
index 8c7fd07f1da..a7154f5089f 100644
--- a/htdocs/contact.class.php
+++ b/htdocs/contact.class.php
@@ -29,7 +29,7 @@
         \version    $Revision$
 */
 
-require_once (DOL_DOCUMENT_ROOT."/lib/ldap.lib.php");
+require_once (DOL_DOCUMENT_ROOT."/lib/authldap.lib.php");