diff -r 245f440b814a -r 70733b2dfd2a predicates.py
--- a/predicates.py	Wed Jan 06 11:47:08 2016 +0100
+++ b/predicates.py	Tue Jan 05 10:31:29 2016 +0100
@@ -498,7 +498,7 @@
                 except ValueError:
                     page_size = None
             if page_size is None:
-                page_size = req.property_value('navigation.page-size')
+                page_size = req.property_value(cls.page_size_property)
         if len(rset) <= (page_size*self.nbpages):
             return 0
         return self.nbpages