diff --git a/passport/passport.d.ts b/passport/passport.d.ts
index 37d4035a0..fc3dd786f 100644
--- a/passport/passport.d.ts
+++ b/passport/passport.d.ts
@@ -5,6 +5,12 @@
 
 /// <reference path="../express/express.d.ts" />
 
+declare module Express {
+    export interface Request {
+        session?: any;
+    }
+}
+
 declare module 'passport' {
     import express = require('express');