diff --git a/src/pfwbged/folder/link.py b/src/pfwbged/folder/link.py
index 5353d52..d47baa4 100644
--- a/src/pfwbged/folder/link.py
+++ b/src/pfwbged/folder/link.py
@@ -166,7 +166,8 @@ class ILink(model.Schema):
     """ """
     folder = RelationChoice(title=_(u'Folder'), required=True,
             source=ObjPathSourceBinder(
-                navigation_tree_query={'portal_type': ('pfwbgedfolder',)}))
+                navigation_tree_query={'portal_type': ('pfwbgedfolder',)},
+                portal_type=('pfwbgedfolder',)))
 
     form.widget(folder=ContentTreeFieldWidget)