diff --git a/inventory/group_vars/buildvm b/inventory/group_vars/buildvm
index f87fd604e0..078d2f9080 100644
--- a/inventory/group_vars/buildvm
+++ b/inventory/group_vars/buildvm
@@ -11,6 +11,7 @@ csi_security_category: High
 dns: 10.3.163.33
 docker_registry: "candidate-registry.fedoraproject.org"
 eth0_ipv4_gw: 10.3.169.254
+eth0_ipv4_nm: 255.255.2555.0
 # for systems that do not match the above - specify the same parameter in
 # the host_vars/$hostname file
 host_group: kojibuilder