diff --git a/tryton/trytond/trytond/modules/product_price_list/price_list.py b/trytond/trytond/modules/product_price_list/price_list.py
index 8d7299ed58..4c68662e1d 100644
--- a/tryton/trytond/trytond/modules/product_price_list/price_list.py
+++ b/tryton/trytond/trytond/modules/product_price_list/price_list.py
@@ -85,8 +85,8 @@ class PriceList(DeactivableMixin, ModelSQL, ModelView):
         return {
             'names': {
                 'unit_price': unit_price if unit_price is not None else Null(),
-                'cost_price': cost_price if unit_price is not None else Null(),
-                'list_price': list_price if unit_price is not None else Null(),
+                'cost_price': cost_price if cost_price is not None else Null(),
+                'list_price': list_price if list_price is not None else Null(),
                 },
             }