diff --git a/doc/api/cluster.md b/doc/api/cluster.md
index 6ea11b08ae2a16..972309a7013690 100644
--- a/doc/api/cluster.md
+++ b/doc/api/cluster.md
@@ -613,24 +613,6 @@ Emitted when the cluster master receives a message from any worker.
 
 See [`child_process` event: `'message'`][].
 
-Before Node.js v6.0, this event emitted only the message and the handle,
-but not the worker object, contrary to what the documentation stated.
-
-If support for older versions is required but a worker object is not
-required, it is possible to work around the discrepancy by checking the
-number of arguments:
-
-```js
-cluster.on('message', (worker, message, handle) => {
-  if (arguments.length === 2) {
-    handle = message;
-    message = worker;
-    worker = undefined;
-  }
-  // ...
-});
-```
-
 ## Event: 'online'
 <!-- YAML
 added: v0.7.0