diff --git a/ext/custom-addons/dp_custom/models/sale.py b/ext/custom-addons/dp_custom/models/sale.py
index e486d2ca..2a821162 100644
--- a/ext/custom-addons/dp_custom/models/sale.py
+++ b/ext/custom-addons/dp_custom/models/sale.py
@@ -242,7 +242,7 @@ class SaleOrder(models.Model):
     @api.model
     def _get_specified_fields(self):
         return ['origin', 'client_order_ref', 'note', 'date_order', 'assembled', 'line_id', 'partner_id',
-                'fiscal_position_id', 'user_id', 'payment_term_id', 'partner_delivery_id', 'partner_invoice_id']
+                'fiscal_position_id', 'user_id', 'payment_term_id', 'partner_delivery_id', 'partner_invoice_id', 'assembly_state']
 
     @api.multi
     def write(self, vals):