diff --git a/ceilometer/central/manager.py b/ceilometer/central/manager.py
index eb97b6894..fb836c902 100644
--- a/ceilometer/central/manager.py
+++ b/ceilometer/central/manager.py
@@ -21,6 +21,7 @@ from keystoneclient.v2_0 import client as ksclient
 from ceilometer import agent
 from ceilometer import extension_manager
 from ceilometer.openstack.common import cfg
+from ceilometer import service  # For cfg.CONF.os_*
 
 OPTS = [
     cfg.ListOpt('disabled_central_pollsters',
diff --git a/ceilometer/nova_client.py b/ceilometer/nova_client.py
index 207d9a993..010255b1f 100644
--- a/ceilometer/nova_client.py
+++ b/ceilometer/nova_client.py
@@ -18,6 +18,7 @@ from functools import wraps
 from novaclient.v1_1 import client as nova_client
 
 from ceilometer.openstack.common import cfg, log
+from ceilometer import service  # For cfg.CONF.os_*
 
 LOG = log.getLogger(__name__)