diff --git a/addons/account/account_invoice_view.xml b/addons/account/account_invoice_view.xml
index f353877dd21..1106bd532d9 100644
--- a/addons/account/account_invoice_view.xml
+++ b/addons/account/account_invoice_view.xml
@@ -181,8 +181,10 @@
                             <field name="date_due"/>
                             <field domain="[('company_id', '=', company_id), ('type', '=', 'payable')]"
                                 name="account_id" groups="account.group_account_user"/>
+                            <field name="internal_number" invisible="1"/>
                             <field name="journal_id" groups="account.group_account_user"
-                                on_change="onchange_journal_id(journal_id, context)" widget="selection"/>
+                                on_change="onchange_journal_id(journal_id, context)" widget="selection"
+                                attrs="{'readonly':[('internal_number','!=',False)]}"/>
                             <field name="currency_id" groups="base.group_multi_currency"/>
                             <field name="check_total" groups="account.group_supplier_inv_check_total"/>
                         </group>
@@ -327,8 +329,10 @@
                         </group>
                         <group>
                             <field name="date_invoice"/>
+                            <field name="internal_number" invisible="1"/>
                             <field name="journal_id" groups="account.group_account_user"
-                                on_change="onchange_journal_id(journal_id, context)" widget="selection"/>
+                                on_change="onchange_journal_id(journal_id, context)" widget="selection"
+                                attrs="{'readonly':[('internal_number','!=',False)]}"/>
                             <field domain="[('company_id', '=', company_id),('type','=', 'receivable')]"
                                 name="account_id" groups="account.group_account_user"/>