diff --git a/nova/objects/aggregate.py b/nova/objects/aggregate.py
index 58347c962..825bd1b27 100644
--- a/nova/objects/aggregate.py
+++ b/nova/objects/aggregate.py
@@ -14,7 +14,6 @@
 
 from oslo_log import log as logging
 from oslo_utils import uuidutils
-
 from sqlalchemy.orm import contains_eager
 from sqlalchemy.orm import joinedload