diff --git a/addons/l10n_ch/views/account_invoice_view.xml b/addons/l10n_ch/views/account_invoice_view.xml
index e550670de85..7edc239378b 100644
--- a/addons/l10n_ch/views/account_invoice_view.xml
+++ b/addons/l10n_ch/views/account_invoice_view.xml
@@ -12,7 +12,7 @@
 
                 <xpath expr="//field[@name='sent']" position="after">
                     <field name="l10n_ch_isr_sent" invisible="1"/>
-                    <field name="l10n_ch_currency_name" invisible="1"/>
+                    <field name="l10n_ch_currency_name" invisible="1" readonly="1"/>
                 </xpath>
 
                 <xpath expr="//button[@id='account_invoice_payment_btn']" position="before">