diff --git a/ansible/roles/mariadb/tasks/register.yml b/ansible/roles/mariadb/tasks/register.yml
index 9285bb9a52..0aa72d2c3f 100644
--- a/ansible/roles/mariadb/tasks/register.yml
+++ b/ansible/roles/mariadb/tasks/register.yml
@@ -10,7 +10,7 @@
         password=''
         host='%'"
   register: haproxy_user
-  changed_when: "{{ (haproxy_user.stdout.split('localhost | SUCCESS => ')[1]|from_json).changed }}"
+  changed_when: "{{ haproxy_user.stdout.find('localhost | SUCCESS => ') != -1 and (haproxy_user.stdout.split('localhost | SUCCESS => ')[1]|from_json).changed }}"
   until: haproxy_user.stdout.split()[2] == 'SUCCESS'
   retries: 10
   delay: 5