diff --git a/lib/cluster.js b/lib/cluster.js
index 22d213ba227..a4b82ca1ccc 100644
--- a/lib/cluster.js
+++ b/lib/cluster.js
@@ -304,7 +304,9 @@ function masterInit() {
     workerEnv.NODE_UNIQUE_ID = '' + id;
 
     for (var i = 0; i < execArgv.length; i++) {
-      var match = execArgv[i].match(/^(--debug|--debug-(brk|port))(=\d+)?$/);
+      var match = execArgv[i].match(
+        /^(--inspect|--debug|--debug-(brk|port))(=\d+)?$/
+      );
 
       if (match) {
         const debugPort = process.debugPort + debugPortOffset;