diff --git a/express/express.d.ts b/express/express.d.ts
index 052173c83..2dc36199c 100644
--- a/express/express.d.ts
+++ b/express/express.d.ts
@@ -38,7 +38,7 @@ declare module "express" {
             (name: RegExp, ...handlers: RequestHandler[]): T;
         }
 
-        interface IRouter<T> {
+        interface IRouter<T> extends RequestHandler {
             /**
              * Map the given param placeholder `name`(s) to the given callback(s).
              *