diff --git a/tailbone/views/customers.py b/tailbone/views/customers.py
index 74f66458..dd8923e6 100644
--- a/tailbone/views/customers.py
+++ b/tailbone/views/customers.py
@@ -557,14 +557,16 @@ class CustomerView(MasterView):
         return HTML.tag('ul', HTML.literal('').join(items))
 
     def get_version_child_classes(self):
-        return [
+        classes = super().get_version_child_classes()
+        classes.extend([
             (model.CustomerGroupAssignment, 'customer_uuid'),
             (model.CustomerPhoneNumber, 'parent_uuid'),
             (model.CustomerEmailAddress, 'parent_uuid'),
             (model.CustomerMailingAddress, 'parent_uuid'),
             (model.CustomerPerson, 'customer_uuid'),
             (model.CustomerNote, 'parent_uuid'),
-        ]
+        ])
+        return classes
 
     def detach_person(self):
         customer = self.get_instance()