diff --git a/bin/osv/orm.py b/bin/osv/orm.py
index cc2f554da60..67360050212 100644
--- a/bin/osv/orm.py
+++ b/bin/osv/orm.py
@@ -2268,12 +2268,9 @@ class orm(orm_template):
         if groupby and fget[groupby]['type'] == 'many2one':
             data_ids = self.search(cr, uid, [('id', 'in', alldata.keys())], order=groupby, context=context)
             data_read = self.read(cr, uid, data_ids, groupby and [groupby] or ['id'], context=context)
-            # restore order of the search as read() uses the default _order:
-            data = []
-            for id in data_ids:
-                for rec in data_read:
-                    if rec['id'] == id:
-                        data.append(rec)
+            # restore order of the search as read() uses the default _order (this is only for groups, so the size of data_read shoud be small):
+            data_read.sort(lambda x,y: cmp(data_ids.index(x['id']), data_ids.index(y['id'])))
+            data = data_read
         else:
             data = self.read(cr, uid, alldata.keys(), groupby and [groupby] or ['id'], context=context)
             if groupby: