diff --git a/addons/payment_paypal/models/__init__.py b/addons/payment_paypal/models/__init__.py
index e85dd257cf2..a1fe670f56f 100644
--- a/addons/payment_paypal/models/__init__.py
+++ b/addons/payment_paypal/models/__init__.py
@@ -1,4 +1,3 @@
 # -*- coding: utf-8 -*-
 
-import account_invoice
 import paypal
diff --git a/addons/payment_paypal/models/account_invoice.py b/addons/payment_paypal/models/account_invoice.py
deleted file mode 100644
index 7b7f3e377b7..00000000000
--- a/addons/payment_paypal/models/account_invoice.py
+++ /dev/null
@@ -1,27 +0,0 @@
-# -*- coding: utf-8 -*-
-
-from openerp import models, fields, api
-
-import werkzeug.urls
-
-class AccountInvoice(models.Model):
-    _inherit = 'account.invoice'
-
-    paypal_url = fields.Char('Paypal Url', compute='_compute_paypal_url')
-
-    @api.depends('type', 'number', 'company_id', 'currency_id')
-    def _compute_paypal_url(self):
-        for inv in self:
-            if inv.type == 'out_invoice' and inv.company_id.paypal_account:
-                params = {
-                    "cmd": "_xclick",
-                    "business": inv.company_id.paypal_account,
-                    "item_name": "%s Invoice %s" % (inv.company_id.name, inv.number or ''),
-                    "invoice": inv.number,
-                    "amount": inv.residual,
-                    "currency_code": inv.currency_id.name,
-                    "button_subtype": "services",
-                    "no_note": "1",
-                    "bn": "Odoo_Invoice_PayNow_" + inv.currency_id.name,
-                }
-                inv.paypal_url = "https://www.paypal.com/cgi-bin/webscr?" + werkzeug.url_encode(params)