diff --git a/lib/keystone b/lib/keystone
index e33081c..ff9714f 100644
--- a/lib/keystone
+++ b/lib/keystone
@@ -108,6 +108,7 @@
 # Bind hosts
 KEYSTONE_ADMIN_BIND_HOST=${KEYSTONE_ADMIN_BIND_HOST:-$KEYSTONE_SERVICE_HOST}
 # Set the tenant for service accounts in Keystone
+SERVICE_TENANT_NAME=${SERVICE_TENANT_NAME:-service}
 SERVICE_PROJECT_NAME=${SERVICE_TENANT_NAME:-service}
 
 # if we are running with SSL use https protocols