diff --git a/freeport/index.d.ts b/freeport/index.d.ts
index c6e8891f52..d8578f5eb5 100644
--- a/freeport/index.d.ts
+++ b/freeport/index.d.ts
@@ -5,5 +5,6 @@
 
 
 declare function freeport(cb: (err: Error, port: number) => void): void;
+declare namespace freeport {}
 
 export = freeport;