diff --git a/defaults/main.yml b/defaults/main.yml
index bc412b5..6bcdb63 100644
--- a/defaults/main.yml
+++ b/defaults/main.yml
@@ -124,7 +124,7 @@ psql_streaming_replication_config:
 # SSL as a special case
 psql_enable_ssl: false
 psql_force_ssl_client_connection: false
-postgresql_letsencrypt_managed: '{% if letsencrypt_acme_install is defined and letsencrypt_acme_install %}true{% else %}false{% endif %}'
+postgresql_letsencrypt_managed: '{% if letsencrypt_acme_install is defined and letsencrypt_acme_install %}true{% else %}false{% endif %} | bool'
 psql_ssl_privkey_global_file: '{% if postgresql_letsencrypt_managed %}{{ letsencrypt_acme_sh_certificates_install_path }}/privkey{% else %}{{ pki_dir }}/keys/{{ ansible_fqdn}}-key.pem{% endif %}'
 psql_ssl_privkey_file: /etc/pki/postgresql/postgresql.key
 psql_ssl_cert_file: '{% if postgresql_letsencrypt_managed %}{{ letsencrypt_acme_sh_certificates_install_path }}/fullchain{% else %}{{ pki_dir }}/certs/{{ ansible_fqdn}}.pem{% endif %}'