diff --git a/roles/xmpp_server/defaults/main.yml b/roles/xmpp_server/defaults/main.yml
index 88509fcea0c559a56a9e8c93da4063aa1c7867a3..a5827c4d9333125de67d07acf7655ef787ac5bc6 100644
--- a/roles/xmpp_server/defaults/main.yml
+++ b/roles/xmpp_server/defaults/main.yml
@@ -1,6 +1,7 @@
 ---
 
 enable_backup: False
-xmpp_domains: "{{ ansible_domain }}"
+xmpp_domains:
+  - "{{ ansible_domain }}"
 xmpp_tls_certificate: "{{ lookup('file', tls_certificate_dir + '/' + ansible_fqdn + '_xmpp.pem') }}"
 xmpp_tls_key: "{{ lookup('file', tls_private_key_dir + '/' + ansible_fqdn + '_xmpp.key') }}"