diff --git a/roles/rabbitmq_cluster/tasks/main.yml b/roles/rabbitmq_cluster/tasks/main.yml
index 53c124928e..71517e6b9a 100644
--- a/roles/rabbitmq_cluster/tasks/main.yml
+++ b/roles/rabbitmq_cluster/tasks/main.yml
@@ -257,9 +257,7 @@
   rabbitmq_parameter:
     component: "federation-upstream"
     name: "pubsub-to-public_pubsub"
-    value:
-      uri: "amqps://pubsub_federation:@rabbitmq01{{ env_suffix }}.phx2.fedoraproject.org/%2Fpubsub?cacertfile=%2Fetc%2Fpki%2Frabbitmq%2Fca%2Frabbitmq-ca.crt&certfile=%2Fetc%2Fpki%2Frabbitmq%2Fcrt%2Frabbitmq-pubsub_federation.crt&keyfile=%2Fetc%2Fpki%2Frabbitmq%2Fkey%2Frabbitmq-pubsub_federation.key&verify=verify_peer&fail_if_no_peer_cert=true&auth_mechanism=external"
-      ack-mode: "on-confirm"
+    value: '{"uri": "amqps://pubsub_federation:@rabbitmq01{{ env_suffix }}.phx2.fedoraproject.org/%2Fpubsub?cacertfile=%2Fetc%2Fpki%2Frabbitmq%2Fca%2Frabbitmq-ca.crt&certfile=%2Fetc%2Fpki%2Frabbitmq%2Fcrt%2Frabbitmq-pubsub_federation.crt&keyfile=%2Fetc%2Fpki%2Frabbitmq%2Fkey%2Frabbitmq-pubsub_federation.key&verify=verify_peer&fail_if_no_peer_cert=true&auth_mechanism=external", "ack-mode": "on-confirm"}'
     state: present
     vhost: /public_pubsub