diff --git a/express-useragent/express-useragent.d.ts b/express-useragent/express-useragent.d.ts
new file mode 100644
index 000000000..2fa2f632b
--- /dev/null
+++ b/express-useragent/express-useragent.d.ts
@@ -0,0 +1,67 @@
+// Type definitions for express-useragent 0.2.4
+// Project: https://www.npmjs.org/package/express-useragent
+// Definitions by: Isman Usoh <https://github.com/isman-usoh/>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+/// <reference path="../express/express.d.ts" />
+
+declare namespace Express {
+    interface UserAgent {
+        isMobile: boolean;
+        isTablet: boolean;
+        isiPad: boolean;
+        isiPod: boolean;
+        isiPhone: boolean;
+        isAndroid: boolean;
+        isBlackberry: boolean;
+        isOpera: boolean;
+        isIE: boolean;
+        isEdge: boolean;
+        isIECompatibilityMode: boolean;
+        isSafari: boolean;
+        isFirefox: boolean;
+        isWebkit: boolean;
+        isChrome: boolean;
+        isKonqueror: boolean;
+        isOmniWeb: boolean;
+        isSeaMonkey: boolean;
+        isFlock: boolean;
+        isAmaya: boolean;
+        isEpiphany: boolean;
+        isDesktop: boolean;
+        isWindows: boolean;
+        isWindowsPhone: boolean;
+        isLinux: boolean;
+        isLinux64: boolean;
+        isMac: boolean;
+        isChromeOS: boolean;
+        isBada: boolean;
+        isSamsung: boolean;
+        isRaspberry: boolean;
+        isBot: boolean;
+        isCurl: boolean;
+        isAndroidTablet: boolean;
+        isWinJs: boolean;
+        isKindleFire: boolean;
+        isSilk: boolean;
+        isCaptive: boolean;
+        isSmartTV: boolean;
+        silkAccelerated: boolean;
+        browser: string;
+        version: string;
+        os: string;
+        platform: string;
+        geoIp: any;
+        source: string;
+    }
+
+    interface Request {
+        useragent?: UserAgent;
+    }
+}
+
+declare module "express-useragent" {
+    import express = require("express");
+
+    export function express(): (req: express.Request, res: express.Response, next?: Function) => void;
+}