diff --git a/chai-as-promised/chai-as-promised.d.ts b/chai-as-promised/chai-as-promised.d.ts
index 51255b4902..d7f1472c7a 100644
--- a/chai-as-promised/chai-as-promised.d.ts
+++ b/chai-as-promised/chai-as-promised.d.ts
@@ -8,6 +8,7 @@
 
 declare module 'chai-as-promised' {
     function chaiAsPromised(chai: any, utils: any): void;
+    namespace chaiAsPromised {}
     export = chaiAsPromised;
 }