diff --git a/gulp-changed/gulp-changed-tests.ts b/gulp-changed/gulp-changed-tests.ts
new file mode 100644
index 000000000..dae92e0fd
--- /dev/null
+++ b/gulp-changed/gulp-changed-tests.ts
@@ -0,0 +1,19 @@
+/// <reference path="../gulp/gulp.d.ts" />
+/// <reference path="./gulp-changed.d.ts" />
+/// <reference path="../gulp-minify-html/gulp-minify-html.d.ts" />
+
+import * as gulp from "gulp";
+import changed = require("gulp-changed");
+import minifyHtml = require("gulp-minify-html");
+
+// Without options
+gulp.src("*.html")
+    .pipe(changed("build"))
+    .pipe(minifyHtml())
+    .pipe(gulp.dest("build"));
+
+// With some options
+gulp.src("*.html")
+    .pipe(changed("build", { hasChanged: changed.compareSha1Digest }))
+    .pipe(minifyHtml())
+    .pipe(gulp.dest("build"));
diff --git a/gulp-changed/gulp-changed.d.ts b/gulp-changed/gulp-changed.d.ts
new file mode 100644
index 000000000..f2a3e0d64
--- /dev/null
+++ b/gulp-changed/gulp-changed.d.ts
@@ -0,0 +1,60 @@
+// Type definitions for gulp-changed
+// Project: https://github.com/sindresorhus/gulp-changed
+// Definitions by: Thomas Corbière <https://github.com/tomc974>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+/// <reference path="../node/node.d.ts"/>
+/// <reference path="../vinyl/vinyl.d.ts"/>
+
+declare module "gulp-changed"
+{
+    import { Transform } from "stream";
+    import File = require("vinyl");
+
+    interface IComparator
+    {
+        /**
+         * @param stream Should be used to queue sourceFile if it passes some comparison
+         * @param callback Should be called when done
+         * @param sourceFile File to operate on
+         * @param destPath Destination for sourceFile as an absolute path
+         */
+        (stream: Transform, callback: Function, sourceFile: File, destPath: string): void;
+    }
+
+    interface IDestination
+    {
+        (file: string|Buffer): string;
+    }
+
+    interface IOptions
+    {
+        /**
+         * The working directory the folder is relative to.
+         * @default process.cwd()
+         */
+        cwd?: string;
+
+        /**
+         * Extension of the destination files.
+         */
+        extension?: string;
+
+        /**
+         * Function that determines whether the source file is different from the destination file.
+         * @default changed.compareLastModifiedTime
+         */
+        hasChanged?: IComparator;
+    }
+
+    interface IGulpChanged
+    {
+        (destination: string|IDestination, options?: IOptions): NodeJS.ReadWriteStream;
+
+        compareLastModifiedTime: IComparator;
+        compareSha1Digest: IComparator;
+    }
+
+    const changed: IGulpChanged;
+    export = changed;
+}