diff --git a/attributs.py b/attributs.py
index cf5fabe..5df039d 100644
--- a/attributs.py
+++ b/attributs.py
@@ -1,4 +1,3 @@
-#!/usr/bin/env python
 # -*- coding: utf-8 -*-
 #
 
@@ -51,7 +50,8 @@ from crans_utils import format_tel, format_mac, mailexist, validate_name, ip4_of
 from crans_utils import to_generalized_time_format, from_generalized_time_format
 import itertools
 
-sys.path.append("/usr/scripts")
+if '/usr/scripts' not in sys.path:
+    sys.path.append("/usr/scripts")
 
 import cranslib.deprecated
 from gestion import config