diff --git a/addons/stock/product.py b/addons/stock/product.py
index e93258b56cd..94252f80439 100644
--- a/addons/stock/product.py
+++ b/addons/stock/product.py
@@ -520,7 +520,7 @@ class product_template(osv.osv):
     }
 
     _defaults = {
-        'sale_delay': lambda *a: 7,
+        'sale_delay': 7,
     }
 product_template()