diff --git a/inventory/inventory b/inventory/inventory
index 809ab25953..3e22b07174 100644
--- a/inventory/inventory
+++ b/inventory/inventory
@@ -658,7 +658,7 @@ github2fedmsg01.stg.iad2.fedoraproject.org
 ipa01.stg.iad2.fedoraproject.org
 ipsilon01.stg.iad2.fedoraproject.org
 koji01.stg.iad2.fedoraproject.org
-# mailman01.stg.iad2.fedoraproject.org
+mailman01.stg.iad2.fedoraproject.org
 mbs-backend01.stg.iad2.fedoraproject.org
 mbs-frontend01.stg.iad2.fedoraproject.org
 memcached01.stg.iad2.fedoraproject.org