diff --git a/src/pfwbged/folder/folder.py b/src/pfwbged/folder/folder.py
index 7c1a78b..835c4d5 100644
--- a/src/pfwbged/folder/folder.py
+++ b/src/pfwbged/folder/folder.py
@@ -27,8 +27,10 @@ grok.templatedir('templates')
 grok.context(IDexterityContainer)
 
 from plone.app.layout.viewlets.interfaces import IBelowContentBody
+import plone.app.contenttypes.interfaces
 
 class FolderViewlet(grok.Viewlet):
+    grok.context(plone.app.contenttypes.interfaces.IFolder)
     grok.template('foldersviewlet')
     grok.viewletmanager(IBelowContentBody)
     grok.order(15)