diff --git a/blazar/plugins/oshosts/host_plugin.py b/blazar/plugins/oshosts/host_plugin.py
index 0566b8fd..f61351f6 100644
--- a/blazar/plugins/oshosts/host_plugin.py
+++ b/blazar/plugins/oshosts/host_plugin.py
@@ -42,10 +42,9 @@ plugin_opts = [
                deprecated_since='0.3.0',
                help='Actions which we will use at the start of the lease'),
     cfg.StrOpt('blazar_az_prefix',
-               default='blazar:',
+               default='blazar_',
                deprecated_name='climate_az_prefix',
-               help='Prefix for Availability Zones created by Blazar'),
-
+               help='Prefix for Availability Zones created by Blazar')
 ]
 
 CONF = cfg.CONF
diff --git a/devstack/plugin.sh b/devstack/plugin.sh
index e097d3ef..88e9c71a 100644
--- a/devstack/plugin.sh
+++ b/devstack/plugin.sh
@@ -84,6 +84,10 @@ function configure_blazar {
     fi
     iniadd $NOVA_CONF filter_scheduler available_filters "blazarnova.scheduler.filters.blazar_filter.BlazarFilter"
 
+    # TODO(hiro-kobayashi): This line should be deleted after the patch
+    # https://review.openstack.org/#/c/471590/ is merged.
+    iniadd $NOVA_CONF blazar:physical:host blazar_az_prefix blazar_
+
     # Database
     recreate_database blazar utf8