diff --git a/lmn-desktop.yml b/lmn-desktop.yml
index d312aab..37b123a 100644
--- a/lmn-desktop.yml
+++ b/lmn-desktop.yml
@@ -23,6 +23,7 @@
 
   vars:
     domain: "{{ ansible_domain }}"
+    kerberize_uris: steinbeis.schule
     rsyncsecret: Muster!
     nfs4: false
     extra_pkgs:
@@ -44,6 +45,7 @@
     - kde
     - lmn_kde
     - lmn_vm
+    - kerberize
 
   tasks:
     - name: Add local user 'virti' in the 'libvirt' group
diff --git a/roles/kerberize/tasks/main.yml b/roles/kerberize/tasks/main.yml
index 8f9b755..aab5553 100644
--- a/roles/kerberize/tasks/main.yml
+++ b/roles/kerberize/tasks/main.yml
@@ -28,6 +28,6 @@
     line: "{{ item }}"
   with_items:
     - '// kerberize for sites in the local domain:'
-    - 'pref("network.negotiate-auth.delegation-uris", "{{ ansible_domain }}");'
-    - 'pref("network.negotiate-auth.trusted-uris", "{{ ansible_domain }}");'
+    - 'pref("network.negotiate-auth.delegation-uris", "{{ kerberize_uris | default(ansible_domain) }}");'
+    - 'pref("network.negotiate-auth.trusted-uris", "{{ kerberize_uris | default(ansible_domain) }}");'
   when: firefox.stat.exists