diff --git a/plone/app/discussion/configure.zcml b/plone/app/discussion/configure.zcml
index 4c6aa72..d44d6a0 100644
--- a/plone/app/discussion/configure.zcml
+++ b/plone/app/discussion/configure.zcml
@@ -43,31 +43,31 @@
 
     <subscriber
         for="plone.app.discussion.interfaces.IComment
-             zope.app.container.contained.IObjectAddedEvent"
+             zope.app.container.interfaces.IObjectAddedEvent"
         handler=".comment.notify_workflow"
         />
 
     <subscriber
         for="plone.app.discussion.interfaces.IComment
-             zope.app.container.contained.IObjectAddedEvent"
+             zope.app.container.interfaces.IObjectAddedEvent"
         handler=".comment.notify_content_object"
         />
 
     <subscriber
         for="plone.app.discussion.interfaces.IComment
-             zope.app.container.contained.IObjectRemovedEvent"
+             zope.app.container.interfaces.IObjectRemovedEvent"
         handler=".comment.notify_content_object"
         />
 
     <subscriber
         for="plone.app.discussion.interfaces.IComment
-             zope.app.container.contained.IObjectAddedEvent"
+             zope.app.container.interfaces.IObjectAddedEvent"
         handler=".tool.index_object"
         />
 
     <subscriber
         for="plone.app.discussion.interfaces.IComment
-             zope.app.container.contained.IObjectRemovedEvent"
+             zope.app.container.interfaces.IObjectRemovedEvent"
         handler=".tool.unindex_object"
         />