diff --git a/types/connect-flash/connect-flash-tests.ts b/types/connect-flash/connect-flash-tests.ts
index 0f22c0cdd5..2b75c4ed77 100644
--- a/types/connect-flash/connect-flash-tests.ts
+++ b/types/connect-flash/connect-flash-tests.ts
@@ -13,4 +13,5 @@ app.use(flash({
 app.use(function(req: Express.Request, res: Express.Response, next: Function) {
     req.flash('Message');
     req.flash('info', 'Message');
+    req.flash();
 });
diff --git a/types/connect-flash/index.d.ts b/types/connect-flash/index.d.ts
index edee056b1a..cb7d460623 100644
--- a/types/connect-flash/index.d.ts
+++ b/types/connect-flash/index.d.ts
@@ -7,6 +7,7 @@
 
 declare namespace Express {
     export interface Request {
+        flash(): { [key: string]: string[] };
         flash(message: string): any;
         flash(event: string, message: string): any;
     }