diff --git a/stock.py b/stock.py
index adf9223666..b3006c25b6 100644
--- a/stock.py
+++ b/stock.py
@@ -1,6 +1,5 @@
 # This file is part of Tryton.  The COPYRIGHT file at the top level of
 # this repository contains the full copyright notices and license terms.
-from decimal import Decimal
 from functools import wraps
 
 from trytond.model import ModelView, Workflow, fields
@@ -8,6 +7,8 @@ from trytond.transaction import Transaction
 from trytond.pool import PoolMeta, Pool
 from trytond.pyson import Eval
 
+from trytond.modules.product import round_price
+
 
 class Location(metaclass=PoolMeta):
     __name__ = 'stock.location'
@@ -211,8 +212,7 @@ class Move(metaclass=PoolMeta):
                 taxes=[t.id for t in line.taxes]):
             line.unit_price = Product.get_purchase_price(
                 [line.product], line.quantity)[line.product.id]
-            line.unit_price = line.unit_price.quantize(
-                Decimal(1) / 10 ** line.__class__.unit_price.digits[1])
+            line.unit_price = round_price(line.unit_price)
         return line
 
     def _get_customer_invoice_line_consignment(self):
@@ -256,8 +256,7 @@ class Move(metaclass=PoolMeta):
                 taxes=[t.id for t in line.taxes]):
             line.unit_price = Product.get_sale_price(
                 [line.product], line.quantity)[line.product.id]
-            line.unit_price = line.unit_price.quantize(
-                Decimal(1) / 10 ** line.__class__.unit_price.digits[1])
+            line.unit_price = round_price(line.unit_price)
         return line
 
     @classmethod
diff --git a/tryton.cfg b/tryton.cfg
index 0a80316d03..d11217837c 100644
--- a/tryton.cfg
+++ b/tryton.cfg
@@ -5,6 +5,7 @@ depends:
     account_invoice_line_standalone
     account_invoice_stock
     ir
+    product
     purchase
     sale
     stock