diff --git a/openslides/utils/person/__init__.py b/openslides/utils/person/__init__.py
index e262022b4..430f04c91 100644
--- a/openslides/utils/person/__init__.py
+++ b/openslides/utils/person/__init__.py
@@ -21,7 +21,7 @@ __all__ = ['receive_persons', 'generate_person_id', 'get_person', 'Person',
            'PersonField', 'PersonMixin', 'EmptyPerson']
 
 
-class EmptyPerson(PersonMixin):
+class EmptyPerson(PersonMixin, Person):
     @property
     def person_id(self):
         return 'empty'