diff --git a/account_voucher_default_amount/__init__.py b/account_voucher_default_amount/__init__.py
new file mode 100644
index 0000000..d9e36db
--- /dev/null
+++ b/account_voucher_default_amount/__init__.py
@@ -0,0 +1,3 @@
+# -*- encoding: utf-8 -*-
+
+from . import account_voucher
diff --git a/account_voucher_default_amount/__openerp__.py b/account_voucher_default_amount/__openerp__.py
new file mode 100644
index 0000000..6b626ba
--- /dev/null
+++ b/account_voucher_default_amount/__openerp__.py
@@ -0,0 +1,43 @@
+# -*- encoding: utf-8 -*-
+##############################################################################
+#
+#    Account Voucher Default Amount module for Odoo
+#    Copyright (C) 2015 Akretion (http://www.akretion.com)
+#    @author Alexis de Lattre <alexis.delattre@akretion.com>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU Affero General Public License as
+#    published by the Free Software Foundation, either version 3 of the
+#    License, or (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU Affero General Public License for more details.
+#
+#    You should have received a copy of the GNU Affero General Public License
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+##############################################################################
+
+
+{
+    'name': 'Account Voucher Default Amount',
+    'version': '0.1',
+    'category': 'Accounting & Finance',
+    'license': 'AGPL-3',
+    'summary': 'Set a default amount on Customer Payments',
+    'description': """
+Account Voucher Default Amount
+==============================
+
+With this module, when you select a Customer in a Customer Payment, the Amount will be set by default to the total Open Balance.
+
+This module has been written by Alexis de Lattre from Akretion <alexis.delattre@akretion.com>.
+    """,
+    'author': 'Akretion',
+    'website': 'http://www.akretion.com',
+    'depends': ['account_voucher'],
+    'data': [],
+    'installable': True,
+}
diff --git a/account_voucher_default_amount/account_voucher.py b/account_voucher_default_amount/account_voucher.py
new file mode 100644
index 0000000..ba4838f
--- /dev/null
+++ b/account_voucher_default_amount/account_voucher.py
@@ -0,0 +1,42 @@
+# -*- encoding: utf-8 -*-
+##############################################################################
+#
+#    Account Voucher Default Amount module for Odoo
+#    Copyright (C) 2015 Akretion (http://www.akretion.com)
+#    @author Alexis de Lattre <alexis.delattre@akretion.com>
+#
+#    This program is free software: you can redistribute it and/or modify
+#    it under the terms of the GNU Affero General Public License as
+#    published by the Free Software Foundation, either version 3 of the
+#    License, or (at your option) any later version.
+#
+#    This program is distributed in the hope that it will be useful,
+#    but WITHOUT ANY WARRANTY; without even the implied warranty of
+#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+#    GNU Affero General Public License for more details.
+#
+#    You should have received a copy of the GNU Affero General Public License
+#    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+##############################################################################
+
+from openerp import models
+
+
+class AccountVoucher(models.Model):
+    _inherit = 'account.voucher'
+
+    def onchange_partner_id(
+            self, cr, uid, ids, partner_id, journal_id, amount,
+            currency_id, ttype, date, context=None):
+        res = super(AccountVoucher, self).onchange_partner_id(
+            cr, uid, ids, partner_id, journal_id, amount,
+            currency_id, ttype, date, context=context)
+        if (
+                partner_id and not amount and ttype == 'receipt'
+                and res.get('value') and res['value'].get('line_cr_ids')):
+            total_open_bal = 0.0
+            for line in res['value']['line_cr_ids']:
+                total_open_bal += line['amount_unreconciled']
+            res['value']['amount'] = total_open_bal
+        return res