diff --git a/openerp/addons/base/res/res_currency.py b/openerp/addons/base/res/res_currency.py
index 4756cdbe01a..dac5988b585 100644
--- a/openerp/addons/base/res/res_currency.py
+++ b/openerp/addons/base/res/res_currency.py
@@ -31,6 +31,12 @@ CURRENCY_DISPLAY_PATTERN = re.compile(r'(\w+)\s*(?:\((.*)\))?')
 
 class res_currency(osv.osv):
     def _current_rate(self, cr, uid, ids, name, arg, context=None):
+        return self._current_rate_computation(cr, uid, ids, name, arg, True, context=context)
+
+    def _current_rate_silent(self, cr, uid, ids, name, arg, context=None):
+        return self._current_rate_computation(cr, uid, ids, name, arg, False, context=context)
+
+    def _current_rate_computation(self, cr, uid, ids, name, arg, raise_on_no_rate, context=None):
         if context is None:
             context = {}
         res = {}
@@ -48,9 +54,12 @@ class res_currency(osv.osv):
             if cr.rowcount:
                 id, rate = cr.fetchall()[0]
                 res[id] = rate
+            elif not raise_on_no_rate:
+                res[id] = 0
             else:
                 raise osv.except_osv(_('Error!'),_("No currency rate associated for currency %d for the given period" % (id)))
         return res
+
     _name = "res.currency"
     _description = "Currency"
     _columns = {
@@ -59,6 +68,10 @@ class res_currency(osv.osv):
         'symbol': fields.char('Symbol', size=4, help="Currency sign, to be used when printing amounts."),
         'rate': fields.function(_current_rate, string='Current Rate', digits=(12,6),
             help='The rate of the currency to the currency of rate 1.'),
+
+        # Do not use for computation ! Same as rate field with silent failing
+        'rate_silent': fields.function(_current_rate_silent, string='Current Rate', digits=(12,6),
+            help='The rate of the currency to the currency of rate 1 (0 if no rate defined).'),
         'rate_ids': fields.one2many('res.currency.rate', 'currency_id', 'Rates'),
         'accuracy': fields.integer('Computational Accuracy'),
         'rounding': fields.float('Rounding Factor', digits=(12,6)),
diff --git a/openerp/addons/base/res/res_currency_view.xml b/openerp/addons/base/res/res_currency_view.xml
index 907eec866fb..c74b677ea72 100644
--- a/openerp/addons/base/res/res_currency_view.xml
+++ b/openerp/addons/base/res/res_currency_view.xml
@@ -22,7 +22,7 @@
                     <field name="company_id" groups="base.group_multi_company"/>
                      <field name="rate_ids" invisible="1"/>
                     <field name="date"/>
-                    <field name="rate"/>
+                    <field name="rate_silent"/>
                     <field name="rounding"/>
                     <field name="accuracy"/>
                     <field name="position"/>
@@ -37,7 +37,7 @@
                 <form string="Currency" version="7.0">
                     <group col="4">
                         <field name="name"/>
-                        <field name="rate"/>
+                        <field name="rate_silent"/>
                         <field name="company_id" groups="base.group_multi_company"/>
                     </group>
 
diff --git a/openerp/tests/test_acl.py b/openerp/tests/test_acl.py
index 1d8d6bfb22a..9f9019e5db9 100644
--- a/openerp/tests/test_acl.py
+++ b/openerp/tests/test_acl.py
@@ -29,18 +29,18 @@ class TestACL(common.TransactionCase):
         view_arch = etree.fromstring(form_view.get('arch'))
         has_tech_feat = self.res_users.has_group(self.cr, self.demo_uid, GROUP_TECHNICAL_FEATURES)
         self.assertFalse(has_tech_feat, "`demo` user should not belong to the restricted group before the test")
-        self.assertTrue('rate' in original_fields, "'rate' field must be properly visible before the test")
-        self.assertNotEquals(view_arch.xpath("//field[@name='rate']"), [],
-                             "Field 'rate' must be found in view definition before the test")
+        self.assertTrue('accuracy' in original_fields, "'accuracy' field must be properly visible before the test")
+        self.assertNotEquals(view_arch.xpath("//field[@name='accuracy']"), [],
+                             "Field 'accuracy' must be found in view definition before the test")
 
         # Restrict access to the field and check it's gone
-        self.res_currency._columns['rate'].groups = GROUP_TECHNICAL_FEATURES
+        self.res_currency._columns['accuracy'].groups = GROUP_TECHNICAL_FEATURES
         fields = self.res_currency.fields_get(self.cr, self.demo_uid, [])
         form_view = self.res_currency.fields_view_get(self.cr, self.demo_uid, False, 'form')
         view_arch = etree.fromstring(form_view.get('arch'))
-        self.assertFalse('rate' in fields, "'rate' field should be gone")
-        self.assertEquals(view_arch.xpath("//field[@name='rate']"), [],
-                             "Field 'rate' must not be found in view definition")
+        self.assertFalse('accuracy' in fields, "'accuracy' field should be gone")
+        self.assertEquals(view_arch.xpath("//field[@name='accuracy']"), [],
+                             "Field 'accuracy' must not be found in view definition")
 
         # Make demo user a member of the restricted group and check that the field is back
         self.tech_group.write({'users': [(4, self.demo_uid)]})
@@ -50,13 +50,13 @@ class TestACL(common.TransactionCase):
         view_arch = etree.fromstring(form_view.get('arch'))
         #import pprint; pprint.pprint(fields); pprint.pprint(form_view)
         self.assertTrue(has_tech_feat, "`demo` user should now belong to the restricted group")
-        self.assertTrue('rate' in fields, "'rate' field must be properly visible again")
-        self.assertNotEquals(view_arch.xpath("//field[@name='rate']"), [],
-                             "Field 'rate' must be found in view definition again")
+        self.assertTrue('accuracy' in fields, "'accuracy' field must be properly visible again")
+        self.assertNotEquals(view_arch.xpath("//field[@name='accuracy']"), [],
+                             "Field 'accuracy' must be found in view definition again")
 
         #cleanup
         self.tech_group.write({'users': [(3, self.demo_uid)]})
-        self.res_currency._columns['rate'].groups = False
+        self.res_currency._columns['accuracy'].groups = False
 
     @mute_logger('openerp.osv.orm')
     def test_field_crud_restriction(self):