diff --git a/addons/users_ldap/users_ldap.py b/addons/users_ldap/users_ldap.py
index 7c3bd0d9c17..92ac59b9bb2 100644
--- a/addons/users_ldap/users_ldap.py
+++ b/addons/users_ldap/users_ldap.py
@@ -22,10 +22,11 @@ from osv import fields, osv
 import pooler
 import tools
 import logging
-from service import security
 import ldap
 from ldap.filter import filter_format
 
+import openerp.exceptions
+
 
 class CompanyLDAP(osv.osv):
     _name = 'res.company.ldap'
@@ -148,12 +149,12 @@ class users(osv.osv):
     def check(self, db, uid, passwd):
         try:
             return super(users,self).check(db, uid, passwd)
-        except security.ExceptionNoTb: # AccessDenied
+        except openerp.exceptions.AccessDenied:
             pass
 
         if not passwd:
             # empty passwords disallowed for obvious security reasons
-            raise security.ExceptionNoTb('AccessDenied')
+            raise openerp.exceptions.AccessDenied()
 
         cr = pooler.get_db(db).cursor()
         user = self.browse(cr, 1, uid)
@@ -187,7 +188,7 @@ class users(osv.osv):
                     logger.warning('cannot check', exc_info=True)
                     pass
         cr.close()
-        raise security.ExceptionNoTb('AccessDenied')
+        raise openerp.exceptions.AccessDenied()
         
 users()
 # vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4: