diff --git a/roles/write-root-marker/tasks/main.yaml b/roles/write-root-marker/tasks/main.yaml
index 2f7b6cbe..567e9db7 100644
--- a/roles/write-root-marker/tasks/main.yaml
+++ b/roles/write-root-marker/tasks/main.yaml
@@ -1,4 +1,4 @@
 - name: Write marker text
   copy:
     dest: "{{ root_marker_dir }}/.root-marker"
-    content: "Project: {{ zuul.project.name }} Branch: {{ zuul.branch }} Build: {{ zuul.build }} Revision: {{ zuul.ref }}"
+    content: "Project: {{ zuul.project.name }} Branch: {{ zuul.branch | default('') }} Build: {{ zuul.build }} Revision: {{ zuul.ref }}"