diff --git a/etc/nova/nova-config-generator.conf b/etc/nova/nova-config-generator.conf
index 8a1ba1fcbd80..c11a4153df63 100644
--- a/etc/nova/nova-config-generator.conf
+++ b/etc/nova/nova-config-generator.conf
@@ -12,6 +12,7 @@ namespace = oslo.policy
 namespace = oslo.service.periodic_task
 namespace = oslo.service.service
 namespace = oslo.db
+namespace = oslo.db.concurrency
 namespace = oslo.middleware
 namespace = oslo.concurrency
 namespace = keystonemiddleware.auth_token