diff --git a/tiramisu/config.py b/tiramisu/config.py
index 07ae837..3ad66be 100644
--- a/tiramisu/config.py
+++ b/tiramisu/config.py
@@ -173,7 +173,7 @@ class Config(object):
         properties = properties & set(self._cfgimpl_context._cfgimpl_settings.get_properties())
         if permissive:
             properties = properties - set(self._cfgimpl_context._cfgimpl_settings.get_permissive())
-            properties = properties - set(self._cfgimpl_permissive)
+        properties = properties - set(self._cfgimpl_permissive)
         properties = list(properties)
         if properties != []:
             raise PropertiesOptionError("trying to access"