diff --git a/addons/barcodes/models/barcodes.py b/addons/barcodes/models/barcodes.py
index 494e47bfad5..08482581bb5 100644
--- a/addons/barcodes/models/barcodes.py
+++ b/addons/barcodes/models/barcodes.py
@@ -66,7 +66,7 @@ class BarcodeNomenclature(models.Model):
         else:
             return False
 
-        
+
     # Returns a valid zero padded ean13 from an ean prefix. the ean prefix must be a string.
     def sanitize_ean(self, ean):
         ean = ean[0:13]
@@ -169,25 +169,20 @@ class BarcodeRule(models.Model):
     _name = 'barcode.rule'
     _order = 'sequence asc'
 
-    @api.model
-    def _encoding_selection_list(self):
-        return [
-                ('any', _('Any')),
-                ('ean13', 'EAN-13'),
-                ('ean8', 'EAN-8'),
-                ('upca', 'UPC-A'),
-        ]
-
-    def _get_type_selection(self):
-        return [('alias', _('Alias')), ('product', _('Unit Product'))]
-
-    _type_selection = lambda self: self._get_type_selection()
 
     name = fields.Char(string='Rule Name', size=32, required=True, help='An internal identification for this barcode nomenclature rule')
     barcode_nomenclature_id = fields.Many2one('barcode.nomenclature', string='Barcode Nomenclature')
     sequence = fields.Integer(string='Sequence', help='Used to order rules such that rules with a smaller sequence match first')
-    encoding = fields.Selection(_encoding_selection_list, string='Encoding', required=True, default='any', help='This rule will apply only if the barcode is encoded with the specified encoding')
-    type = fields.Selection(_type_selection, string='Type', required=True, default='product')
+    encoding = fields.Selection([
+                ('any', _('Any')),
+                ('ean13', 'EAN-13'),
+                ('ean8', 'EAN-8'),
+                ('upca', 'UPC-A'),
+        ], string='Encoding', required=True, default='any', help='This rule will apply only if the barcode is encoded with the specified encoding')
+    type = fields.Selection([
+            ('alias', _('Alias')),
+            ('product', _('Unit Product'))
+        ], string='Type', required=True, default='product')
     pattern = fields.Char(string='Barcode Pattern', size=32, help="The barcode matching pattern", required=True, default='.*')
     alias = fields.Char(string='Alias', size=32, default='0', help='The matched pattern will alias to this barcode', required=True)
 
diff --git a/addons/point_of_sale/models/barcode_rule.py b/addons/point_of_sale/models/barcode_rule.py
index ffbf0b384b8..9fab9caa69a 100644
--- a/addons/point_of_sale/models/barcode_rule.py
+++ b/addons/point_of_sale/models/barcode_rule.py
@@ -1,21 +1,17 @@
 # -*- coding: utf-8 -*-
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
-import sets
 
-from odoo import models
+from odoo import models, fields
 from odoo.tools.translate import _
 
 
 class BarcodeRule(models.Model):
     _inherit = 'barcode.rule'
 
-    def _get_type_selection(self):
-        types = sets.Set(super(BarcodeRule, self)._get_type_selection())
-        types.update([
+    type = fields.Selection(selection_add=[
             ('weight', _('Weighted Product')),
             ('price', _('Priced Product')),
             ('discount', _('Discounted Product')),
             ('client', _('Client')),
             ('cashier', _('Cashier'))
         ])
-        return list(types)
diff --git a/addons/pos_mercury/models/pos_mercury.py b/addons/pos_mercury/models/pos_mercury.py
index 6bf92d7ba1a..2244d258816 100644
--- a/addons/pos_mercury/models/pos_mercury.py
+++ b/addons/pos_mercury/models/pos_mercury.py
@@ -2,7 +2,6 @@
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
 import logging
-import sets
 
 from openerp import models, fields, api, _
 
@@ -11,12 +10,9 @@ _logger = logging.getLogger(__name__)
 class barcode_rule(models.Model):
     _inherit = 'barcode.rule'
 
-    def _get_type_selection(self):
-        types = sets.Set(super(barcode_rule, self)._get_type_selection())
-        types.update([
+    type = fields.Selection(selection_add=[
             ('credit', _('Credit Card'))
         ])
-        return list(types)
 
 
 class pos_mercury_payment_data(models.Model):
diff --git a/addons/stock/models/barcode.py b/addons/stock/models/barcode.py
index 701ce3fc54d..99b88475e47 100644
--- a/addons/stock/models/barcode.py
+++ b/addons/stock/models/barcode.py
@@ -1,18 +1,15 @@
 # -*- coding: utf-8 -*-
 # Part of Odoo. See LICENSE file for full copyright and licensing details.
 
-from odoo import models, _
+from odoo import models, fields, _
 
 
 class BarcodeRule(models.Model):
     _inherit = 'barcode.rule'
 
-    def _get_type_selection(self):
-        types = set(super(BarcodeRule, self)._get_type_selection())
-        types.update([
+    type = fields.Selection(selection_add=[
             ('weight', _('Weighted Product')),
             ('location', _('Location')),
             ('lot', _('Lot')),
             ('package', _('Package'))
         ])
-        return list(types)