diff --git a/product/ERP5/Document/Predicate.py b/product/ERP5/Document/Predicate.py
index 6540f471c9acbfb6b4bf4508113117b5153ce9bf..b2e2b7b2a593165302915372edf48cee69430800 100644
--- a/product/ERP5/Document/Predicate.py
+++ b/product/ERP5/Document/Predicate.py
@@ -453,5 +453,7 @@ class Predicate(Folder):
   def searchPredicate(self, **kw):
     """
       Returns a list of documents matching the predicate
+
+      TO BE IMPLEMENTED using portal_catalog(**kw)
     """
     pass