diff --git a/tiramisu/value.py b/tiramisu/value.py
index 247d273..d2aa6a1 100644
--- a/tiramisu/value.py
+++ b/tiramisu/value.py
@@ -241,7 +241,7 @@ class Values(object):
                                         force_properties=force_properties,
                                         force_permissives=force_permissives)
         if config_error is not None:
-            raise ConfigError(config_error)
+            raise config_error
         return value
 
     def __setitem__(self, opt, value):