diff --git a/production.py b/production.py
index 2b2f0a7d17..c663b90774 100644
--- a/production.py
+++ b/production.py
@@ -429,6 +429,8 @@ class Production(Workflow, ModelSQL, ModelView):
                 if product == self.product:
                     move.unit_price = Decimal(
                         cost / Decimal(str(quantity))).quantize(digit)
+                else:
+                    move.unit_price = Decimal(0)
                 move.save()
         self._set_move_planned_date()