--- a/src/pyams_portal/interfaces/__init__.py	Wed Jun 20 14:39:23 2018 +0200
+++ b/src/pyams_portal/interfaces/__init__.py	Wed Jun 20 18:13:19 2018 +0200
@@ -159,6 +159,9 @@
     target_interface = Attribute("Target interface provided by this renderer")
 
 
+PORTLET_RENDERER_SETTINGS_KEY = 'pyams_portal.renderer.settings::{0}'
+
+
 class IPortletRendererSettings(Interface):
     """Portlet renderer settings interface"""