diff --git a/__init__.py b/__init__.py
index 50ec9602db..b9749a1805 100644
--- a/__init__.py
+++ b/__init__.py
@@ -2,15 +2,16 @@
 # this repository contains the full copyright notices and license terms.
 
 from trytond.pool import Pool
-from .sale import *
+from . import sale
 from .stock import *
 
 
 def register():
     Pool.register(
-        Configuration,
-        ConfigurationSaleMethod,
-        Sale,
-        SaleLine,
+        sale.Configuration,
+        sale.ConfigurationSaleMethod,
+        sale.Sale,
+        sale.SaleLine,
+        sale.Promotion,
         ShipmentOut,
         module='sale_shipment_cost', type_='model')
diff --git a/sale.py b/sale.py
index bf97ced25a..ed7cd30ec8 100644
--- a/sale.py
+++ b/sale.py
@@ -10,7 +10,8 @@ from trytond.pool import Pool, PoolMeta
 
 from trytond.modules.product import price_digits
 
-__all__ = ['Configuration', 'ConfigurationSaleMethod', 'Sale', 'SaleLine']
+__all__ = ['Configuration', 'ConfigurationSaleMethod', 'Sale', 'SaleLine',
+    'Promotion']
 sale_shipment_cost_method = fields.Selection(
         'get_sale_shipment_cost_methods', "Sale Shipment Cost Method")