diff --git a/docs/modules/zookeeper/examples/getting_started/code/zookeeper.yaml b/docs/modules/zookeeper/examples/getting_started/code/zookeeper.yaml
index 4858c8ed..06a68e27 100644
--- a/docs/modules/zookeeper/examples/getting_started/code/zookeeper.yaml
+++ b/docs/modules/zookeeper/examples/getting_started/code/zookeeper.yaml
@@ -4,6 +4,8 @@ kind: ZookeeperCluster
 metadata:
   name: simple-zk
 spec:
+  clusterConfig:
+    listenerClass: external-unstable
   image:
     productVersion: 3.9.2
   servers: