diff --git a/ansible/roles/designate/templates/designate.conf.j2 b/ansible/roles/designate/templates/designate.conf.j2
index 0510d1e880..033c7bb844 100644
--- a/ansible/roles/designate/templates/designate.conf.j2
+++ b/ansible/roles/designate/templates/designate.conf.j2
@@ -52,6 +52,7 @@ threads = 1000
 enabled_tasks = None
 
 [network_api:neutron]
+ca_certificates_file = "{{ openstack_cacert }}"
 endpoint_type = internalURL
 
 [storage:sqlalchemy]