--- a/src/pyams_content/shared/site/manager.py	Wed Apr 11 16:44:46 2018 +0200
+++ b/src/pyams_content/shared/site/manager.py	Wed Apr 11 16:46:31 2018 +0200
@@ -24,7 +24,7 @@
 from pyams_content.reference.pictograms.interfaces import IPictogramManagerTarget
 from pyams_content.root.interfaces import ISiteRoot
 from pyams_content.shared.common.interfaces import ISharedContentFactory
-from pyams_content.shared.site.interfaces import ISiteManager, ISiteManagerFactory, ISiteFolderFactory
+from pyams_content.shared.site.interfaces import ISiteManager, ISiteManagerFactory, ISiteFolderFactory, ISiteContainer
 from pyams_form.interfaces.form import IFormContextPermissionChecker
 from pyams_i18n.interfaces import II18n
 from pyams_portal.interfaces import IPortalContext
@@ -34,7 +34,7 @@
 
 # import packages
 from pyams_content.shared.common.manager import BaseSharedTool
-from pyams_content.shared.site import Topic, ISiteContainer
+from pyams_content.shared.site import Topic
 from pyams_content.shared.site.container import SiteContainerMixin
 from pyams_content.shared.site.folder import SiteFolder
 from pyams_skin.skin import UserSkinnableContent