--- a/src/pyams_content/features/search/interfaces.py	Wed Dec 19 10:40:42 2018 +0100
+++ b/src/pyams_content/features/search/interfaces.py	Wed Dec 19 10:40:58 2018 +0100
@@ -15,7 +15,8 @@
 from zope.interface import Interface
 from zope.schema import Bool, Choice, Set
 
-from pyams_content.interfaces import GUEST_ROLE, MANAGER_ROLE
+from pyams_content import _
+from pyams_content.interfaces import GUEST_ROLE, IBaseContent, MANAGER_ROLE
 from pyams_content.shared.common.interfaces import CONTENT_TYPES_VOCABULARY
 from pyams_content.shared.common.interfaces.types import ALL_DATA_TYPES_VOCABULARY
 from pyams_content.shared.site.interfaces import IBaseSiteItem, ISiteElement
@@ -26,8 +27,6 @@
 from pyams_security.schema import PrincipalsSet
 from pyams_sequence.interfaces import ISequentialIdTarget
 
-from pyams_content import _
-
 
 class ISearchFolderRoles(Interface):
     """Search folder roles"""
@@ -49,7 +48,7 @@
                            required=False)
 
 
-class ISearchFolder(IBaseSiteItem, ISiteElement, IWfView, ISequentialIdTarget):
+class ISearchFolder(IBaseContent, IBaseSiteItem, ISiteElement, IWfView, ISequentialIdTarget):
     """Search folder interface"""
 
     order_by = Choice(title=_("Order by"),