diff --git a/host-wittgenstein.yml b/host-wittgenstein.yml
index 9c6112e..a51540f 100644
--- a/host-wittgenstein.yml
+++ b/host-wittgenstein.yml
@@ -34,14 +34,14 @@
           - i2c-tools
 
 
-#    - name: Set MAC address for proper DHCP recognition
-#      # Uses mac variable from inventory
-#      ansible.builtin.template:
-#        src: templates/network-interfaces-dhcp-mac.j2
-#        dest: /etc/network/interfaces.d/wittgenstein-mac
-#        owner: root
-#        group: root
-#        mode: '0644'
+    - name: Set MAC address for proper DHCP recognition
+      # Uses mac variable from inventory
+      ansible.builtin.template:
+        src: templates/network-interfaces-dhcp-mac.j2
+        dest: /etc/network/interfaces.d/wittgenstein-mac
+        owner: root
+        group: root
+        mode: '0644'
 
     - name: Disable IPv6
       # Because it is not working....
diff --git a/host_vars/wittgenstein.n39.eu/vars.yml b/host_vars/wittgenstein.n39.eu/vars.yml
index 0fd637c..e1be7b9 100644
--- a/host_vars/wittgenstein.n39.eu/vars.yml
+++ b/host_vars/wittgenstein.n39.eu/vars.yml
@@ -1,4 +1,5 @@
 server_admin: "admin+wittgenstein@netz39.de"
+mac: "b8:27:eb:48:f1:59"
 ansible_python_interpreter: /usr/bin/python3
 gatekeeper_user: pi
 data_dir: "/srv/data"