diff --git a/openerp/addons/base/tests/test_base.py b/openerp/addons/base/tests/test_base.py
index 7403c884410..5001293867b 100644
--- a/openerp/addons/base/tests/test_base.py
+++ b/openerp/addons/base/tests/test_base.py
@@ -8,6 +8,7 @@ class test_base(common.TransactionCase):
     def setUp(self):
         super(test_base,self).setUp()
         self.res_partner = self.registry('res.partner')
+        self.res_users = self.registry('res.users')
 
         # samples use effective TLDs from the Mozilla public suffix
         # list at http://publicsuffix.org
@@ -282,6 +283,21 @@ class test_base(common.TransactionCase):
         p0.refresh()
         self.assertEquals(p0.vat, sunhelmvat2, 'Commercial fields must be automatically synced')
 
+    def test_60_read_group(self):
+        cr, uid = self.cr, self.uid
+        for user_data in [
+          {'name': 'Alice', 'login': 'alice', 'color': 1, 'function': 'Friend'},
+          {'name': 'Bob', 'login': 'bob', 'color': 2, 'function': 'Friend'},
+          {'name': 'Eve', 'login': 'eve', 'color': 3, 'function': 'Eavesdropper'},
+        ]:
+          self.res_users.create(cr, uid, user_data)
+
+        groups_data = self.res_users.read_group(cr, uid, domain=[('login', 'in', ('alice', 'bob', 'eve'))], fields=['name', 'color', 'function'], groupby='function')
+        self.assertEqual(len(groups_data), 2, "Incorrect number of results when grouping on a field")
+        for group_data in groups_data:
+          self.assertIn('color', group_data, "Aggregated data for the column 'color' is not present in read_group return values")
+          self.assertEqual(group_data['color'], 3, "Incorrect sum for aggregated data for the column 'color'")
+
 class test_partner_recursion(common.TransactionCase):
 
     def setUp(self):
diff --git a/openerp/osv/orm.py b/openerp/osv/orm.py
index e7121bb4635..7f8748aa05b 100644
--- a/openerp/osv/orm.py
+++ b/openerp/osv/orm.py
@@ -2670,12 +2670,12 @@ class BaseModel(object):
             f for f in fields
             if f not in ('id', 'sequence')
             if fget[f]['type'] in ('integer', 'float')
-            if (f in self._columns and getattr(self._columns[f], '_classic_write'))]
+            if (f in self._all_columns and getattr(self._all_columns[f].column, '_classic_write'))]
         for f in aggregated_fields:
             group_operator = fget[f].get('group_operator', 'sum')
             if flist:
                 flist += ', '
-            qualified_field = '"%s"."%s"' % (self._table, f)
+            qualified_field = self._inherits_join_calc(f, query)
             flist += "%s(%s) AS %s" % (group_operator, qualified_field, f)
 
         gb = groupby and (' GROUP BY ' + qualified_groupby_field) or ''