diff --git a/inventory/group_vars/buildvm_stg b/inventory/group_vars/buildvm_stg
index 716a8932bd..e43dac84b9 100644
--- a/inventory/group_vars/buildvm_stg
+++ b/inventory/group_vars/buildvm_stg
@@ -12,6 +12,7 @@ datacenter: staging
 dns1: 10.3.163.33
 docker_registry: "candidate-registry.stg.fedoraproject.org"
 eth0_ipv4_gw: 10.3.167.254
+eth0_ipv4_nm: 255.255.255.0
 # for systems that do not match the above - specify the same parameter in
 # the host_vars/$hostname file
 host_group: kojibuilder