diff --git a/tiramisu/api.py b/tiramisu/api.py
index 7caba99..44d4731 100644
--- a/tiramisu/api.py
+++ b/tiramisu/api.py
@@ -979,14 +979,18 @@ class TiramisuContextConfig(TiramisuContext):
 
     def _c_copy(self,
                   session_id=None,
+                  persistent=False,
                   storage=None):
         return Config(self.config_bag.context.duplicate(session_id,
+                                                        persistent=persistent,
                                                         storage=storage))
 
     def _c_deepcopy(self,
                   session_id=None,
+                  persistent=False,
                   storage=None):
         return Config(self.config_bag.context.duplicate(session_id,
+                                                        persistent=persistent,
                                                         storage=storage,
                                                         deep=True))
 
diff --git a/tiramisu/config.py b/tiramisu/config.py
index 2ca919f..9b83096 100644
--- a/tiramisu/config.py
+++ b/tiramisu/config.py
@@ -681,6 +681,7 @@ class _CommonConfig(SubConfig):
                   force_values=None,
                   force_settings=None,
                   storage=None,
+                  persistent=False,
                   deep=False):
         if isinstance(self, KernelConfig):
             config = KernelConfig(self._impl_descr,
@@ -688,6 +689,7 @@ class _CommonConfig(SubConfig):
                                   session_id=session_id,
                                   force_values=force_values,
                                   force_settings=force_settings,
+                                  persistent=persistent,
                                   storage=storage)
         elif isinstance(self, KernelMetaConfig):
             config = KernelMetaConfig([],
@@ -696,6 +698,7 @@ class _CommonConfig(SubConfig):
                                       session_id=session_id,
                                       force_values=force_values,
                                       force_settings=force_settings,
+                                      persistent=persistent,
                                       storage=storage)
         else:
             raise Exception('hu?')
@@ -706,7 +709,7 @@ class _CommonConfig(SubConfig):
             )._pp_.exportation())
         if self._impl_meta:
             if deep:
-                meta = self._impl_meta().duplicate(deep=deep, storage=storage)
+                meta = self._impl_meta().duplicate(deep=deep, storage=storage, persistent=persistent)
                 meta._impl_children.append(config)
                 config._impl_meta = weakref.ref(meta)
                 config = meta