diff --git a/htdocs/main.inc.php b/htdocs/main.inc.php
index d5795eebf2f..1995f6d6eaf 100644
--- a/htdocs/main.inc.php
+++ b/htdocs/main.inc.php
@@ -155,7 +155,7 @@ if (! session_id() || ! isset($_SESSION["dol_login"]))
 	    // Authentification Apache KO ou non active, pas de mode force on demande le login
 	    require_once(DOL_DOCUMENT_ROOT."/includes/pear/Auth/Auth.php");
 	
-	    $ldapdebug=false;
+	    $ldapdebug=true;
 	    if ($ldapdebug) print "DEBUG: Traces connexions LDAP<br>\n";
 	    
 	    if ($conf->global->LDAP_SERVER_TYPE == "activedirectory")