diff --git a/node/node.d.ts b/node/node.d.ts
index 08939492fd..9d08a014e8 100644
--- a/node/node.d.ts
+++ b/node/node.d.ts
@@ -1056,6 +1056,7 @@ declare module "child_process" {
         connected: boolean;
         disconnect(): void;
         unref(): void;
+        ref(): void;
     }
 
     export interface SpawnOptions {