1 files changed, 1 insertions, 3 deletions
diff --git a/lib/internal/cluster/utils.js b/lib/internal/cluster/utils.js
index 3fc5e408b7..f20206c842 100644
--- a/lib/internal/cluster/utils.js
+++ b/lib/internal/cluster/utils.js
@@ -1,5 +1,4 @@
 'use strict';
-const util = require('util');
 
 module.exports = {
   sendHelper,
@@ -14,12 +13,11 @@ function sendHelper(proc, message, handle, cb) {
     return false;
 
   // Mark message as internal. See INTERNAL_PREFIX in lib/child_process.js
-  message = util._extend({ cmd: 'NODE_CLUSTER' }, message);
+  message = { cmd: 'NODE_CLUSTER', ...message, seq };
 
   if (typeof cb === 'function')
     callbacks.set(seq, cb);
 
-  message.seq = seq;
   seq += 1;
   return proc.send(message, handle);
 }