diff --git a/addons/mrp/wizard/change_production_qty.py b/addons/mrp/wizard/change_production_qty.py
index de98b052a81..4b895236523 100644
--- a/addons/mrp/wizard/change_production_qty.py
+++ b/addons/mrp/wizard/change_production_qty.py
@@ -63,6 +63,7 @@ class ChangeProductionQty(models.TransientModel):
                     wo.state = 'progress'
                 # assign moves; last operation receive all unassigned moves
                 operation = wo.operation_id
+                
 
                 # TODO: following could be put in a function as it is similar as code in _workorders_create
                 # TODO: only needed when creating new moves
diff --git a/addons/mrp_byproduct/models/mrp_production.py b/addons/mrp_byproduct/models/mrp_production.py
index 924c13fc2e8..c60c67ab4f0 100644
--- a/addons/mrp_byproduct/models/mrp_production.py
+++ b/addons/mrp_byproduct/models/mrp_production.py
@@ -23,6 +23,7 @@ class MrpProduction(models.Model):
                 'product_uom': sub_product.product_uom_id.id,
                 'location_id': source,
                 'location_dest_id': production.location_dest_id.id,
+                'operation_id': sub_product.operation_id.id,
                 'production_id': production.id,
                 'origin': production.name,
                 'unit_factor': qty1 / (production.product_qty - production.qty_produced),