diff --git a/group_vars/all/vars.yaml b/group_vars/all/vars.yaml
index 8a6a9810..b5b87e94 100644
--- a/group_vars/all/vars.yaml
+++ b/group_vars/all/vars.yaml
@@ -5,5 +5,6 @@ ansible_header: |
        See https://gitlab.crans.org/nounous/ansible.
        Run by: {{ ansible_env.SUDO_USER }}
        Latest commit: {% if dirty %}({{dirty}}) {% endif %}{{ lookup('pipe', 'git rev-parse HEAD') }}
-       {% set _, rpath = template_path.split('roles/') %}Template: roles/{{ rpath }}
+       {% if template_path is defined %}{% set _, rpath = template_path.split('roles/') %}Template: roles/{{ rpath }}
+       {% endif %}
     +++++++++++++++++++++++++++++++++++++++++++++++++++