diff --git a/addons/account/account_invoice_view.xml b/addons/account/account_invoice_view.xml
index eda507508e4..51a020b9b75 100644
--- a/addons/account/account_invoice_view.xml
+++ b/addons/account/account_invoice_view.xml
@@ -53,7 +53,7 @@
                     <notebook>
                         <page string="Line">
                             <field name="product_id" on_change="product_id_change(product_id, uos_id, quantity, name, parent.type, parent.partner_id, parent.fiscal_position, price_unit, parent.address_invoice_id, parent.currency_id, {'company_id': parent.company_id})"/>
-                            <field name="uos_id"  on_change="uos_id_change(product_id, uos_id, quantity, name, parent.type, parent.partner_id, parent.fiscal_position, price_unit, parent.address_invoice_id, parent.currency_id, {'company_id': parent.company_id})"/>
+                            <field name="uos_id"  widget="selection" on_change="uos_id_change(product_id, uos_id, quantity, name, parent.type, parent.partner_id, parent.fiscal_position, price_unit, parent.address_invoice_id, parent.currency_id, {'company_id': parent.company_id})"/>
                             <field name="quantity"/>
                             <field name="price_unit"/>
                             <field name="discount"/>