diff --git a/inventory/host_vars/undercloud02.cloud.fedoraproject.org b/inventory/host_vars/undercloud02.cloud.fedoraproject.org
index 362d04b5dd..8797513ccf 100644
--- a/inventory/host_vars/undercloud02.cloud.fedoraproject.org
+++ b/inventory/host_vars/undercloud02.cloud.fedoraproject.org
@@ -1,5 +1,5 @@
 ---
-nm: 255.255.255.128
+nm: 255.255.254.0
 gw: 172.23.1.254
 dns: 8.8.8.8