diff --git a/CHANGELOG b/CHANGELOG
index fecb59c66d..d1a7828baf 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,5 @@
+* Set default journal when paying line
+
 Version 4.2.0 - 2016-11-28
 * Bug fixes (see mercurial logs for details)
 * Allow to block payment of line
diff --git a/account.py b/account.py
index 0ec9557791..2ed55fbfe4 100644
--- a/account.py
+++ b/account.py
@@ -229,8 +229,17 @@ class PayLine(Wizard):
             return 'pay'
 
     def default_ask_journal(self, fields):
+        pool = Pool()
+        Journal = pool.get('account.payment.journal')
         values = {}
         company, currency = self._missing_journal()[:2]
+        journals = Journal.search([
+                ('company', '=', company),
+                ('currency', '=', currency),
+                ])
+        if len(journals) == 1:
+            journal, = journals
+            values['journal'] = journal.id
         values['company'] = company.id
         values['currency'] = currency.id
         values['journals'] = [j.id for j in self._get_journals().itervalues()]
diff --git a/tests/scenario_account_payment.rst b/tests/scenario_account_payment.rst
index 89b1294f70..13bd22ccd8 100644
--- a/tests/scenario_account_payment.rst
+++ b/tests/scenario_account_payment.rst
@@ -65,7 +65,8 @@ Partially pay line::
     >>> Payment = Model.get('account.payment')
     >>> line, = [l for l in move.lines if l.account == payable]
     >>> pay_line = Wizard('account.move.line.pay', [line])
-    >>> pay_line.form.journal = payment_journal
+    >>> pay_line.form.journal == payment_journal
+    True
     >>> pay_line.execute('start')
     >>> payment, = Payment.find()
     >>> payment.party == supplier
@@ -88,7 +89,6 @@ Partially pay line::
 Partially fail to pay the remaining::
 
     >>> pay_line = Wizard('account.move.line.pay', [line])
-    >>> pay_line.form.journal = payment_journal
     >>> pay_line.execute('start')
     >>> payment, = Payment.find([('state', '=', 'draft')])
     >>> payment.amount
@@ -113,7 +113,6 @@ Pay line and block it after::
     >>> move.click('post')
     >>> line, = [l for l in move.lines if l.account == payable]
     >>> pay_line = Wizard('account.move.line.pay', [line])
-    >>> pay_line.form.journal = payment_journal
     >>> pay_line.execute('start')
     >>> len(line.payments)
     1
@@ -125,7 +124,6 @@ Pay line and block it after::
 Try to pay blocked line::
 
     >>> pay_line = Wizard('account.move.line.pay', [line])
-    >>> pay_line.form.journal = payment_journal
     >>> pay_line.execute('start')  # doctest: +IGNORE_EXCEPTION_DETAIL
     Traceback (most recent call last):
         ...
diff --git a/tests/scenario_account_payment_invoice.rst b/tests/scenario_account_payment_invoice.rst
index f43ca95f13..34a410a934 100644
--- a/tests/scenario_account_payment_invoice.rst
+++ b/tests/scenario_account_payment_invoice.rst
@@ -74,7 +74,6 @@ Partially pay line::
 
     >>> Payment = Model.get('account.payment')
     >>> pay_line = Wizard('account.move.line.pay', [line_to_pay])
-    >>> pay_line.form.journal = payment_journal
     >>> pay_line.execute('start')
     >>> payment, = Payment.find()
     >>> payment.amount = Decimal('20')