diff --git a/inventory/host_vars/qa01.qa.fedoraproject.org b/inventory/host_vars/qa01.qa.fedoraproject.org
index 5f0c06530c..b9c991227d 100644
--- a/inventory/host_vars/qa01.qa.fedoraproject.org
+++ b/inventory/host_vars/qa01.qa.fedoraproject.org
@@ -6,6 +6,7 @@ sudoers: "{{ private }}/files/sudo/qavirt-sudoers"
 nrpe_procs_warn: 1400
 nrpe_procs_crit: 1600
 em3_ip: 10.5.124.151
+em3_nm: 255.255.255.0
 gw: 10.5.124.254
 
 # openQA tap worker hosts (like this one) do stuff with ifcfg that base