diff --git a/host_vars/wittgenstein.n39.eu/vars.yml b/host_vars/wittgenstein.n39.eu/vars.yml
index 6479b44..6bca558 100644
--- a/host_vars/wittgenstein.n39.eu/vars.yml
+++ b/host_vars/wittgenstein.n39.eu/vars.yml
@@ -1,3 +1,4 @@
+---
 server_admin: "admin+wittgenstein@netz39.de"
 mac: "b8:27:eb:48:f1:59"
 ansible_python_interpreter: /usr/bin/python3