diff --git a/host_vars/pve3.grote.lan.yml b/host_vars/pve3.grote.lan.yml
index a3dfaee9..932c510b 100644
--- a/host_vars/pve3.grote.lan.yml
+++ b/host_vars/pve3.grote.lan.yml
@@ -48,3 +48,4 @@
       cron_hour_zfs_scrub: "23"
   ### mgrote.apcupsd
   apcupsd_nis_master: false
+  apcupsd_nis_master_hostname: pve2.grote.lan
diff --git a/host_vars/pve4.grote.lan.yml b/host_vars/pve4.grote.lan.yml
index a3dfaee9..932c510b 100644
--- a/host_vars/pve4.grote.lan.yml
+++ b/host_vars/pve4.grote.lan.yml
@@ -48,3 +48,4 @@
       cron_hour_zfs_scrub: "23"
   ### mgrote.apcupsd
   apcupsd_nis_master: false
+  apcupsd_nis_master_hostname: pve2.grote.lan