diff --git a/src/design/plone/ioprenoto/interfaces.py b/src/design/plone/ioprenoto/interfaces.py
index e2ff17c..fe2fd60 100644
--- a/src/design/plone/ioprenoto/interfaces.py
+++ b/src/design/plone/ioprenoto/interfaces.py
@@ -1,8 +1,8 @@
 # -*- coding: utf-8 -*-
 """Module where all interfaces, events and exceptions live."""
 
-from zope.publisher.interfaces.browser import IDefaultBrowserLayer
+from redturtle.prenotazioni.interfaces import IRedturtlePrenotazioniLayer
 
 
-class IDesignPloneIoprenotoLayer(IDefaultBrowserLayer):
+class IDesignPloneIoprenotoLayer(IRedturtlePrenotazioniLayer):
     """Marker interface that defines a browser layer."""