--- a/src/pyams_utils/include.py	Thu Mar 15 09:24:20 2018 +0100
+++ b/src/pyams_utils/include.py	Thu Mar 15 09:25:02 2018 +0100
@@ -23,7 +23,7 @@
 # import packages
 from chameleon import PageTemplateFile
 from pyams_utils.context import ContextSelector
-from pyams_utils.request import get_annotations, get_debug
+from pyams_utils.request import get_annotations, get_debug, RequestSelector
 from pyams_utils.site import site_factory
 from pyams_utils.tales import ExtensionExpr
 from pyams_utils.traversing import NamespaceTraverser
@@ -50,6 +50,7 @@
 
     # add custom subscriber predicate to filter events via supported interface(s)
     config.add_subscriber_predicate('context_selector', ContextSelector)
+    config.add_subscriber_predicate('request_selector', RequestSelector)
 
     # load registry components
     config.registry.registerAdapter(AttributeAnnotations, (IAttributeAnnotatable, ), IAnnotations)