diff --git a/linux/k3s/prometheus/tasks/main.yml b/linux/k3s/prometheus/tasks/main.yml
index e17cc5c..82423f9 100644
--- a/linux/k3s/prometheus/tasks/main.yml
+++ b/linux/k3s/prometheus/tasks/main.yml
@@ -26,7 +26,7 @@
               hosts:
                  - "{{ alertmanager_fqdn }}"
       alertmanagerSpec:
-        externalUrl: "https://{{ alert_manager_fqdn }}/"
+        externalUrl: "https://{{ alertmanager_fqdn }}/"
         routePrefix: /
       grafana:
         ingress: