diff --git a/lib/cinder b/lib/cinder
index cbe732e..fe278f6 100644
--- a/lib/cinder
+++ b/lib/cinder
@@ -365,7 +365,7 @@
         CINDER_USER=$(keystone user-create \
             --name=cinder \
             --pass="$SERVICE_PASSWORD" \
-            --tenant_id $SERVICE_TENANT \
+            --tenant-id $SERVICE_TENANT \
             --email=cinder@example.com \
             | grep " id " | get_field 2)
         keystone user-role-add \