diff --git a/request-promise/request-promise-tests.ts b/request-promise/request-promise-tests.ts
index a4d28a8f44..347cca818d 100644
--- a/request-promise/request-promise-tests.ts
+++ b/request-promise/request-promise-tests.ts
@@ -27,7 +27,7 @@ options = {
 };
 
 rp(options)
-    .then(function (response) {
+    .then(function (response: http.IncomingMessage) {
         console.log("DELETE succeeded with status %d", response.statusCode);
     })
     .catch(console.error);