diff --git a/tiramisu/config.py b/tiramisu/config.py
index d255bf3..d0b870c 100644
--- a/tiramisu/config.py
+++ b/tiramisu/config.py
@@ -31,24 +31,20 @@ from tiramisu.value import Values
 
 class SubConfig(object):
     "sub configuration management entry"
-    __slots__ = ('_cfgimpl_descr', '_cfgimpl_parent', '_cfgimpl_context')
+    __slots__ = ('_cfgimpl_descr', '_cfgimpl_context')
 
-    def __init__(self, descr, parent, context):  # FIXME , slots):
+    def __init__(self, descr, context):
         """ Configuration option management master class
 
         :param descr: describes the configuration schema
         :type descr: an instance of ``option.OptionDescription``
-        :param parent: parent's `Config`
-        :type parent: `Config`
         :param context: the current root config
         :type context: `Config`
         """
         # main option description
         self._cfgimpl_descr = descr
         # sub option descriptions
-        self._cfgimpl_parent = parent
         self._cfgimpl_context = context
-        #self._cfgimpl_build(slots)
 
     def cfgimpl_get_context(self):
         return self._cfgimpl_context
@@ -133,7 +129,7 @@ class SubConfig(object):
                                      "no attribute {2}".format(self.__class__,
                                                                opt_or_descr._name,
                                                                name))
-            return SubConfig(opt_or_descr, self, self._cfgimpl_context)
+            return SubConfig(opt_or_descr, self._cfgimpl_context)
         # special attributes
         if name.startswith('_cfgimpl_'):
             # if it were in __dict__ it would have been found already
@@ -157,16 +153,6 @@ class SubConfig(object):
                                  force_properties=force_properties)
         return self, path[-1]
 
-    def _cfgimpl_get_path(self):
-        "the path in the attribute access meaning."
-        #FIXME optimisation
-        subpath = []
-        obj = self
-        while obj._cfgimpl_parent is not None:
-            subpath.insert(0, obj._cfgimpl_descr._name)
-            obj = obj._cfgimpl_parent
-        return ".".join(subpath)
-
     def getkey(self):
         return self._cfgimpl_descr.getkey(self)
 
@@ -373,14 +359,12 @@ class Config(SubConfig):
 
         :param descr: describes the configuration schema
         :type descr: an instance of ``option.OptionDescription``
-        :param parent: is None if the ``Config`` is root parent Config otherwise
-        :type parent: ``Config``
         :param context: the current root config
         :type context: `Config`
         """
         self._cfgimpl_settings = Setting()
         self._cfgimpl_values = Values(self)
-        super(Config, self).__init__(descr, None, self)  # , slots)
+        super(Config, self).__init__(descr, self)  # , slots)
         self._cfgimpl_build_all_paths()
 
     def _cfgimpl_build_all_paths(self):
diff --git a/tiramisu/option.py b/tiramisu/option.py
index 5b9b222..04f0c10 100644
--- a/tiramisu/option.py
+++ b/tiramisu/option.py
@@ -574,10 +574,7 @@ def apply_requires(opt, config):
         # filters the callbacks
         setting = config.cfgimpl_get_settings()
         trigger_actions = build_actions(opt._requires)
-        if isinstance(opt, OptionDescription):
-            optpath = config._cfgimpl_get_path() + '.' + opt._name
-        else:
-            optpath = config.cfgimpl_get_context().cfgimpl_get_description().get_path_by_opt(opt)
+        optpath = config.cfgimpl_get_context().cfgimpl_get_description().get_path_by_opt(opt)
         for requires in trigger_actions.values():
             matches = False
             for require in requires: