diff --git a/restify/restify.d.ts b/restify/restify.d.ts
index f1cc9766a..6e0ee450a 100644
--- a/restify/restify.d.ts
+++ b/restify/restify.d.ts
@@ -194,6 +194,8 @@ declare module "restify" {
   export class RequestThrottledError { constructor(message: any); }
   export class ResourceNotFoundError { constructor(message: any); }
   export class WrongAcceptError { constructor(message: any); }
+  export class UnsupportedMediaTypeError { constructor(message: any); }
+  export class RequestTimeoutError { constructor(message: any); }
 
   export function acceptParser(parser: any): RequestHandler;
   export function authorizationParser(): RequestHandler;