diff --git a/attributs.py b/attributs.py
index 9fca5c7..aeeee5b 100644
--- a/attributs.py
+++ b/attributs.py
@@ -50,12 +50,10 @@ from unicodedata import normalize
 from crans_utils import format_tel, format_mac, mailexist, validate_name, ip4_of_rid, ip6_of_mac
 import itertools
 
-sys.path.append("/usr/scripts/")
+sys.path.append("/usr/scripts")
 import cranslib.deprecated
-sys.path.append("/usr/scripts/gestion")
-import config
-import config.impression
-import annuaires_pg
+from gestion import config
+from gestion import annuaires_pg
 
 #: Serveur SMTP
 smtpserv = "smtp.crans.org"
@@ -772,9 +770,15 @@ class macAddress(Attr):
     category = 'base_tech'
     can_modify = [parent, nounou, cableur]
     ldap_name = "macAddress"
+    default = u'<automatique>'
 
     def parse_value(self, mac):
-        self.value = format_mac(mac)
+        mac = mac.lower()
+        if mac == macAddress.default:
+            self.value = mac
+        else:
+            self.value = format_mac(mac)
+
 
     def __unicode__(self):
         return unicode(self.value).lower()