diff --git a/mayan/apps/acls/classes.py b/mayan/apps/acls/classes.py
index 4d1a0608dc..7d3b2e35d3 100644
--- a/mayan/apps/acls/classes.py
+++ b/mayan/apps/acls/classes.py
@@ -56,7 +56,7 @@ class ModelPermission(object):
 
         permissions = []
 
-        class_permissions = cls._registry.get(type(instance))
+        class_permissions = cls.get_for_class(klass=type(instance))
 
         if class_permissions:
             permissions.extend(class_permissions)