diff --git a/roles/account-automation-common/vars/main.yml b/roles/account-automation-common/vars/main.yml
index a9ea87b76579b4e67e8c0110e69e38b5a45941f4..3383bd3c52adda6e2cede76c876b74ba17510cac 100644
--- a/roles/account-automation-common/vars/main.yml
+++ b/roles/account-automation-common/vars/main.yml
@@ -15,7 +15,7 @@ account_automation_config:
   frontend_ip_addrs: "{{ services['frontend'].hosts | map('extract', hostvars) | map(attribute='ips') | flatten | sort | list }}"
   static_mail_domains: "{{ static_mail_domains | sort | list }}"
   mailman3_admin_user: "admin"
-  mailman3_admin_password: "{{ mailman_rest_password }}"
+  mailman3_admin_password: "{{ mailman_rest_password | default('') }}"
   mailer_params:
     gpg_key_id: "{{ account_automation_gpg_key_id | default('') }}"
     gpg_homedir: "/etc/ai/gpg"