diff --git a/CHANGELOG b/CHANGELOG
index 2c9135b4b3..997de0cb8a 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,4 @@
+* Model doesn't convert anymore ids for inherited methods
 * Remove required attribute on Boolean fields
 * Add One2One field
 * Add AUTOINCREMENT to sqlite primary key
diff --git a/trytond/model/model.py b/trytond/model/model.py
index 7eb092d209..fdb48ffafa 100644
--- a/trytond/model/model.py
+++ b/trytond/model/model.py
@@ -107,23 +107,7 @@ class Model(object):
             model_obj = self.pool.get(model_name)
             if hasattr(model_obj, name) and \
                     callable(getattr(model_obj, name)):
-                def func(*args, **kwargs):
-                    if args:
-                        ids = args[0]
-                        int_id = False
-                        if isinstance(ids, (int, long)):
-                            int_id = True
-                            ids = [ids]
-                        if reduce(lambda x, y: x and
-                                isinstance(y, (int, long)), ids, True):
-                            # Replace ids by the parent ids
-                            ids = [getattr(x, field_name).id for x in
-                                    self.browse(ids)]
-                        if int_id:
-                            ids = ids[0]
-                        args = tuple([ids] + list(args[1:]))
-                    return getattr(model_obj, name)(*args, **kwargs)
-                return func
+                return getattr(model_obj, name)
         raise AttributeError
 
     def _inherits_reload(self):