diff --git a/account_constraints/model/account_move_line.py b/account_constraints/model/account_move_line.py
index 78ed280f1..278289d3d 100644
--- a/account_constraints/model/account_move_line.py
+++ b/account_constraints/model/account_move_line.py
@@ -24,6 +24,12 @@ from openerp import models, api, exceptions, _
 class AccountMoveLine(models.Model):
     _inherit = 'account.move.line'
 
+    @api.model
+    def _get_write_authorized_fields(self):
+        """ This method can be overrride to add some field that can be written
+        directly on account move line """
+        return ["reconcile_id", "reconcile_partial_id"]
+
     @api.multi
     def _authorized_reconcile(self, vals):
         """ Check if only reconcile_id and/or reconcile_partial_id are altered.
@@ -33,7 +39,7 @@ class AccountMoveLine(models.Model):
         """
         if not vals:
             return False
-        rec_keys = set(["reconcile_id", "reconcile_partial_id"])
+        rec_keys = set(self._get_write_authorized_fields())
         write_keys = set(vals)
         return rec_keys.issuperset(write_keys)