diff --git a/keystone/assignment/controllers.py b/keystone/assignment/controllers.py
index 3137e2a609..845744d1f5 100644
--- a/keystone/assignment/controllers.py
+++ b/keystone/assignment/controllers.py
@@ -266,8 +266,7 @@ class ProjectAssignmentV3(controller.V3Controller):
     @controller.filterprotected('domain_id', 'enabled', 'name')
     def list_user_projects(self, request, filters, user_id):
         hints = ProjectAssignmentV3.build_driver_hints(request, filters)
-        refs = self.assignment_api.list_projects_for_user(user_id,
-                                                          hints=hints)
+        refs = self.assignment_api.list_projects_for_user(user_id)
         return ProjectAssignmentV3.wrap_collection(request.context_dict,
                                                    refs,
                                                    hints=hints)
diff --git a/keystone/assignment/core.py b/keystone/assignment/core.py
index a816222db3..6db4d32093 100644
--- a/keystone/assignment/core.py
+++ b/keystone/assignment/core.py
@@ -223,7 +223,7 @@ class Manager(manager.Manager):
 
     # TODO(henry-nash): We might want to consider list limiting this at some
     # point in the future.
-    def list_projects_for_user(self, user_id, hints=None):
+    def list_projects_for_user(self, user_id):
         assignment_list = self.list_role_assignments(
             user_id=user_id, effective=True)
         # Use set() to process the list to remove any duplicates
@@ -233,7 +233,7 @@ class Manager(manager.Manager):
 
     # TODO(henry-nash): We might want to consider list limiting this at some
     # point in the future.
-    def list_domains_for_user(self, user_id, hints=None):
+    def list_domains_for_user(self, user_id):
         assignment_list = self.list_role_assignments(
             user_id=user_id, effective=True)
         # Use set() to process the list to remove any duplicates