diff --git a/lib/internal/worker.js b/lib/internal/worker.js
index 41432f55e94..88580893cdc 100644
--- a/lib/internal/worker.js
+++ b/lib/internal/worker.js
@@ -71,7 +71,6 @@ Object.setPrototypeOf(MessagePort.prototype, EventEmitter.prototype);
 // Finally, purge methods we don't want to be public.
 delete MessagePort.prototype.stop;
 delete MessagePort.prototype.drain;
-delete MessagePort.prototype.hasRef;
 MessagePort.prototype.ref = MessagePortPrototype.ref;
 MessagePort.prototype.unref = MessagePortPrototype.unref;