diff --git a/lib/cluster.js b/lib/cluster.js
index 6e4dc4004e..1051291312 100644
--- a/lib/cluster.js
+++ b/lib/cluster.js
@@ -266,7 +266,7 @@ function masterInit() {
       var key;
       for (key in cluster.workers) {
         var worker = cluster.workers[key];
-        if (worker.state === 'online') {
+        if (worker.state === 'online' || worker.state === 'listening') {
           process._debugProcess(worker.process.pid);
         } else {
           worker.once('online', function() {