diff --git a/barcodes_generate/models/barcode_rule.py b/barcodes_generate/models/barcode_rule.py
index a1482282..2931878d 100644
--- a/barcodes_generate/models/barcode_rule.py
+++ b/barcodes_generate/models/barcode_rule.py
@@ -4,7 +4,7 @@
 # @author: Sylvain LE GAL (https://twitter.com/legalsylvain)
 # License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl.html).
 
-from openerp import models, fields, api, _
+from openerp import models, fields, api, _, exceptions
 
 _GENERATE_TYPE = [
     ('no', 'No generation'),