diff --git a/addons/point_of_sale/i18n/point_of_sale.pot b/addons/point_of_sale/i18n/point_of_sale.pot
index d6080616d14..8bfd1ca91c4 100644
--- a/addons/point_of_sale/i18n/point_of_sale.pot
+++ b/addons/point_of_sale/i18n/point_of_sale.pot
@@ -5982,6 +5982,13 @@ msgid ""
 " specific tax rates."
 msgstr ""
 
+#. module: point_of_sale
+#: code:addons/point_of_sale/models/account_journal.py:0
+#, python-format
+msgid ""
+"This journal is associated with a payment method. You cannot modify its type"
+msgstr ""
+
 #. module: point_of_sale
 #. openerp-web
 #: code:addons/point_of_sale/static/src/js/ChromeWidgets/DebugWidget.js:0
diff --git a/addons/point_of_sale/models/account_journal.py b/addons/point_of_sale/models/account_journal.py
index 3e41f4476b8..c511384884f 100644
--- a/addons/point_of_sale/models/account_journal.py
+++ b/addons/point_of_sale/models/account_journal.py
@@ -1,10 +1,16 @@
 # -*- coding: utf-8 -*-
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 # Copyright (C) 2004-2008 PC Solutions (<http://pcsol.be>). All Rights Reserved
-from odoo import fields, models, api
-
+from odoo import fields, models, api, _
+from odoo.exceptions import ValidationError
 
 class AccountJournal(models.Model):
     _inherit = 'account.journal'
 
     pos_payment_method_ids = fields.One2many('pos.payment.method', 'journal_id', string='Point of Sale Payment Methods')
+
+    @api.constrains('type')
+    def _check_type(self):
+        methods = self.env['pos.payment.method'].sudo().search([("journal_id", "in", self.ids)])
+        if methods:
+            raise ValidationError(_("This journal is associated with a payment method. You cannot modify its type"))