diff --git a/sale_discount_total/views/account_invoice_view.xml b/sale_discount_total/views/account_invoice_view.xml
index 61456b7ae..df97545c2 100644
--- a/sale_discount_total/views/account_invoice_view.xml
+++ b/sale_discount_total/views/account_invoice_view.xml
@@ -8,7 +8,7 @@
             <field name="inherit_id" ref="account.invoice_form"/>
             <field name="arch" type="xml">
                 <xpath expr="//field[@name='discount']" position="attributes">
-                    <attribute name="digits">(16, 2)</attribute>
+                    <attribute name="digits">[16, 2]</attribute>
                 </xpath>
                 <xpath expr="//field[@name='amount_untaxed']" position="after">
                         <field name="amount_discount"/>
@@ -32,7 +32,7 @@
             <field name="inherit_id" ref="account.view_invoice_line_tree"/>
             <field name="arch" type="xml">
                 <xpath expr="//field[@name='discount']" position="attributes">
-                    <attribute name="digits">(16, 2)</attribute>
+                    <attribute name="digits">[16, 2]</attribute>
                 </xpath>
             </field>
         </record>