diff --git a/inventory/group_vars/mailman b/inventory/group_vars/mailman
index 26acd93d6b..113be4af60 100644
--- a/inventory/group_vars/mailman
+++ b/inventory/group_vars/mailman
@@ -14,6 +14,9 @@ tcp_ports: [
 
 fas_client_groups: sysadmin-tools,sysadmin-main
 
+# for fedora-messaging
+username: "mailman{{ env_suffix }}"
+
 # These are consumed by a task in roles/fedmsg/base/main.yml
 fedmsg_certs:
 - service: shell
diff --git a/inventory/group_vars/mailman_stg b/inventory/group_vars/mailman_stg
index 8480f62676..bc58edcf43 100644
--- a/inventory/group_vars/mailman_stg
+++ b/inventory/group_vars/mailman_stg
@@ -13,6 +13,9 @@ tcp_ports: [
 ]
 fas_client_groups: sysadmin-tools,sysadmin-main
 
+# for fedora-messaging
+username: "mailman{{ env_suffix }}"
+
 # These are consumed by a task in roles/fedmsg/base/main.yml
 fedmsg_certs:
 - service: shell