diff --git a/account_usability/__manifest__.py b/account_usability/__manifest__.py
index 0a3470c..a422df3 100644
--- a/account_usability/__manifest__.py
+++ b/account_usability/__manifest__.py
@@ -36,6 +36,7 @@ This module has been written by Alexis de Lattre from Akretion <alexis.delattre@
         ],
     'data': [
         'account_view.xml',
+        'account_report.xml',
         'partner_view.xml',
         'product_view.xml',
         'wizard/account_invoice_mark_sent_view.xml',
diff --git a/account_usability/account_report.xml b/account_usability/account_report.xml
new file mode 100644
index 0000000..5e66699
--- /dev/null
+++ b/account_usability/account_report.xml
@@ -0,0 +1,15 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  Copyright 2018 Akretion (http://www.akretion.com/)
+  @author: Alexis de Lattre <alexis.delattre@akretion.com>
+  License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+-->
+
+<odoo>
+
+<record id="account.account_invoices" model="ir.actions.report.xml">
+    <!-- Don't attach on supplier invoices/refunds ! -->
+    <field name="attachment">(object.type in ('out_invoice', 'out_refund')) and (object.state in ('open','paid')) and ('INV'+(object.number or '').replace('/','')+'.pdf')</field>
+</record>
+
+</odoo>