diff --git a/api-error-handler/api-error-handler-tests.ts b/api-error-handler/api-error-handler-tests.ts
index 0d0ca85d97..fc92cf9a70 100644
--- a/api-error-handler/api-error-handler-tests.ts
+++ b/api-error-handler/api-error-handler-tests.ts
@@ -9,3 +9,5 @@ api.get('/users/:userid', function (req, res, next) {
 });
 
 api.use(errorHandler());
+
+let res: errorHandler.Response;
diff --git a/api-error-handler/api-error-handler.d.ts b/api-error-handler/api-error-handler.d.ts
index d66aabf9b7..90318acd00 100644
--- a/api-error-handler/api-error-handler.d.ts
+++ b/api-error-handler/api-error-handler.d.ts
@@ -8,6 +8,22 @@
 declare module 'api-error-handler' {
     import * as express from 'express';
 
+    namespace apiErrorHandler {
+
+      // Body response: the JSON returned by api-error-handler
+      // See https://github.com/expressjs/api-error-handler/blob/1.0.0/index.js
+      interface Response {
+          status: number;
+          stack?: string;
+          message: string;
+
+          // Client errors
+          code?: any;
+          name?: string;
+          type?: any;
+      }
+    }
+
     function apiErrorHandler(options?: any): express.ErrorRequestHandler;
 
     export = apiErrorHandler;