diff --git a/product/ERP5/bootstrap/erp5_core/PortalTypeTemplateItem/portal_types/Predicate.xml b/product/ERP5/bootstrap/erp5_core/PortalTypeTemplateItem/portal_types/Predicate.xml
index dc8c65321a97b64b64d53617009cbb1c20a1f7cd..b7c48a3d51c2ed7bd9bb559ebc5b1edaf0772617 100644
--- a/product/ERP5/bootstrap/erp5_core/PortalTypeTemplateItem/portal_types/Predicate.xml
+++ b/product/ERP5/bootstrap/erp5_core/PortalTypeTemplateItem/portal_types/Predicate.xml
@@ -57,6 +57,10 @@ Other predicates must be implemented through scripts. \n
             <key> <string>title</string> </key>
             <value> <string></string> </value>
         </item>
+        <item>
+            <key> <string>type_class</string> </key>
+            <value> <string>Predicate</string> </value>
+        </item>
       </dictionary>
     </pickle>
   </record>