diff --git a/xos/attic/header.py b/xos/attic/header.py
index e483538..36d0a6f 100644
--- a/xos/attic/header.py
+++ b/xos/attic/header.py
@@ -1,5 +1,5 @@
 from django.db import models
-from core.models import Service, XOSBase, Slice, Instance, Tenant, TenantWithContainer, Node, Image, User, Flavor, NetworkParameter, NetworkParameterType, Port, AddressPool
+from core.models import Service, XOSBase, Slice, Instance, ServiceInstance, TenantWithContainer, Node, Image, User, Flavor, NetworkParameter, NetworkParameterType, Port, AddressPool
 from core.models.xosbase import StrippedCharField
 import os
 from django.db import models, transaction