diff --git a/panko/server/single.yml b/panko/server/single.yml
index cb1a449..968267c 100644
--- a/panko/server/single.yml
+++ b/panko/server/single.yml
@@ -16,6 +16,8 @@
             enabled: true
   panko:
     server:
+      identity:
+        protocol: ${_param:internal_protocol}
       database:
         x509:
           enabled: ${_param:openstack_mysql_x509_enabled}