diff --git a/inventory/group_vars/9iron.yml b/inventory/group_vars/9iron.yml
index 58203ab..acdb0f4 100644
--- a/inventory/group_vars/9iron.yml
+++ b/inventory/group_vars/9iron.yml
@@ -74,6 +74,7 @@ matrix_url: "matrix.9iron.club"
 matrix_enable_registration: "true"
 matrix_admin_contact: "mailto:rehashedsalt@cock.li"
 # Nagios
+nagios_master: web2.9iron.club
 nagios_user_name: salt
 nagios_user_password: !vault |
           $ANSIBLE_VAULT;1.1;AES256