diff --git a/roles/emit-job-header/README.rst b/roles/emit-job-header/README.rst
new file mode 100644
index 000000000..bdb97c7ed
--- /dev/null
+++ b/roles/emit-job-header/README.rst
@@ -0,0 +1,7 @@
+Log a few lines about the job.
+
+**Role Variables**
+
+.. zuul:rolevar:: zuul_log_url
+
+   Base URL where logs are to be found.
diff --git a/roles/emit-job-header/tasks/main.yaml b/roles/emit-job-header/tasks/main.yaml
index 11319c720..8bd780707 100644
--- a/roles/emit-job-header/tasks/main.yaml
+++ b/roles/emit-job-header/tasks/main.yaml
@@ -3,5 +3,5 @@
   when: zuul.change_url is defined
 
 - debug:
-    msg: "At completion, logs for this job will be availble at {{ log_path }}"
-  when: log_path is defined
+    msg: "At completion, logs for this job will be availble at "{{ zuul_log_url }}/{{ log_path }}"
+  when: zuul_log_url is defined and log_path is defined