diff --git a/inventory/inventory b/inventory/inventory
index 93a537f0a3..809ab25953 100644
--- a/inventory/inventory
+++ b/inventory/inventory
@@ -158,7 +158,7 @@ github2fedmsg01.stg.iad2.fedoraproject.org
 mailman01.iad2.fedoraproject.org
 
 [mailman_stg]
-# mailman01.stg.iad2.fedoraproject.org
+mailman01.stg.iad2.fedoraproject.org
 
 [mbs_frontend]
 mbs-frontend01.iad2.fedoraproject.org