diff --git a/types/node/index.d.ts b/types/node/index.d.ts
index c96e1965b1..767805d9ec 100644
--- a/types/node/index.d.ts
+++ b/types/node/index.d.ts
@@ -1176,6 +1176,7 @@ declare module "cluster" {
         stdio?: any[];
         uid?: number;
         gid?: number;
+        inspectPort?: number | (() => number);
     }
 
     export interface Address {