diff --git a/sale.py b/sale.py
index 1c52de47ed..3337736d01 100644
--- a/sale.py
+++ b/sale.py
@@ -50,6 +50,11 @@ class PromotionCoupon(ModelSQL, ModelView):
         'sale.promotion.coupon.number', 'coupon', "Numbers")
     promotion = fields.Many2One('sale.promotion', "Promotion", required=True)
 
+    @classmethod
+    def __setup__(cls):
+        super().__setup__()
+        cls.__access__.add('promotion')
+
     @classmethod
     def default_number_of_use(cls):
         return 0
@@ -71,6 +76,7 @@ class PromotionCouponNumber(DeactivableMixin, ModelSQL, ModelView):
     @classmethod
     def __setup__(cls):
         super(PromotionCouponNumber, cls).__setup__()
+        cls.__access__.add('coupon')
         cls.active = fields.Function(
             fields.Boolean("Active"), 'get_active', searcher='search_active')
 
diff --git a/sale.xml b/sale.xml
index ab618330de..8ed4bee467 100644
--- a/sale.xml
+++ b/sale.xml
@@ -20,22 +20,6 @@ this repository contains the full copyright notices and license terms. -->
             <field name="name">coupon_list</field>
         </record>
 
-        <record model="ir.model.access" id="access_coupon">
-            <field name="model" search="[('model', '=', 'sale.promotion.coupon')]"/>
-            <field name="perm_read" eval="True"/>
-            <field name="perm_write" eval="False"/>
-            <field name="perm_create" eval="False"/>
-            <field name="perm_delete" eval="False"/>
-        </record>
-        <record model="ir.model.access" id="access_coupon_sale_admin">
-            <field name="model" search="[('model', '=', 'sale.promotion.coupon')]"/>
-            <field name="group" ref="sale.group_sale_admin"/>
-            <field name="perm_read" eval="True"/>
-            <field name="perm_write" eval="True"/>
-            <field name="perm_create" eval="True"/>
-            <field name="perm_delete" eval="True"/>
-        </record>
-
         <record model="ir.ui.view" id="coupon_number_view_form">
             <field name="model">sale.promotion.coupon.number</field>
             <field name="type">form</field>
@@ -47,22 +31,6 @@ this repository contains the full copyright notices and license terms. -->
             <field name="name">coupon_number_list</field>
         </record>
 
-        <record model="ir.model.access" id="access_coupon_number">
-            <field name="model" search="[('model', '=', 'sale.promotion.coupon.number')]"/>
-            <field name="perm_read" eval="True"/>
-            <field name="perm_write" eval="False"/>
-            <field name="perm_create" eval="False"/>
-            <field name="perm_delete" eval="False"/>
-        </record>
-        <record model="ir.model.access" id="access_coupon_number_sale_admin">
-            <field name="model" search="[('model', '=', 'sale.promotion.coupon.number')]"/>
-            <field name="group" ref="sale.group_sale_admin"/>
-            <field name="perm_read" eval="True"/>
-            <field name="perm_write" eval="True"/>
-            <field name="perm_create" eval="True"/>
-            <field name="perm_delete" eval="True"/>
-        </record>
-
         <record model="ir.ui.view" id="sale_view_form">
             <field name="model">sale.sale</field>
             <field name="inherit" ref="sale.sale_view_form"/>