diff --git a/production.py b/production.py
index 5b231df6d1..354e5ddf57 100644
--- a/production.py
+++ b/production.py
@@ -11,6 +11,8 @@ from trytond.model.exceptions import AccessError
 from trytond.pyson import Eval, Bool
 from trytond.transaction import Transaction
 
+from trytond.modules.product import round_price
+
 
 class Production(metaclass=PoolMeta):
     __name__ = 'production'
@@ -60,8 +62,7 @@ class Production(metaclass=PoolMeta):
                 cycle_cost = Decimal(cycle_cost)
             cost += cycle_cost
 
-        digits = self.__class__.cost.digits
-        return cost.quantize(Decimal(str(10 ** -digits[1])))
+        return round_price(cost)
 
     @classmethod
     @ModelView.button
diff --git a/tryton.cfg b/tryton.cfg
index d34a0f811c..1bcbcb1c81 100644
--- a/tryton.cfg
+++ b/tryton.cfg
@@ -3,6 +3,7 @@ version=5.5.0
 depends:
     company
     ir
+    product
     production
     production_routing
     stock
diff --git a/work.py b/work.py
index 9e7c20266c..d09912fe5a 100644
--- a/work.py
+++ b/work.py
@@ -14,7 +14,7 @@ from trytond.pool import Pool
 from trytond.pyson import Eval, If, Bool
 from trytond.transaction import Transaction
 
-from trytond.modules.product import price_digits
+from trytond.modules.product import price_digits, round_price
 from .exceptions import PickerError
 
 
@@ -314,7 +314,6 @@ class WorkCycle(Workflow, ModelSQL, ModelView):
             if center.cost_method == 'cycle':
                 self.cost = center.cost_price
             elif center.cost_method == 'hour':
-                digits = self.__class__.cost.digits
                 hours = self.duration.total_seconds() / (60 * 60)
                 self.cost = center.cost_price * Decimal(str(hours))
-                self.cost = self.cost.quantize(Decimal(str(10 ** -digits[1])))
+                self.cost = round_price(self.cost)