diff --git a/combined-stream/combined-stream-tests.ts b/combined-stream/combined-stream-tests.ts
new file mode 100644
index 0000000000..776e530e63
--- /dev/null
+++ b/combined-stream/combined-stream-tests.ts
@@ -0,0 +1,30 @@
+import * as CombinedStream from "combined-stream";
+import { createReadStream, createWriteStream } from "fs";
+
+const stream1 = new CombinedStream();
+
+stream1.append(createReadStream("tsconfig.json"));
+stream1.append(createReadStream("tslint.json"));
+stream1.append(createReadStream("index.d.ts"));
+
+stream1.pipe(createWriteStream("combined.txt"));
+
+const stream2 = CombinedStream.create({
+    maxDataSize: 1 << 32,
+    pauseStreams: false,
+});
+
+stream1.destroy();
+
+// should log true
+console.log(CombinedStream.isStreamLike(stream2));
+
+stream2.on("data", (data) => {
+    console.log(data);
+});
+
+stream2.pipe(createWriteStream("combined.txt"));
+
+stream2.write(CombinedStream.name);
+
+stream2.destroy();
diff --git a/combined-stream/index.d.ts b/combined-stream/index.d.ts
new file mode 100644
index 0000000000..cada758701
--- /dev/null
+++ b/combined-stream/index.d.ts
@@ -0,0 +1,56 @@
+// Type definitions for combined-stream 1.0
+// Project: https://github.com/felixge/node-combined-stream
+// Definitions by: Felix Geisendörfer <https://github.com/felixge>, Tomek Łaziuk <https://github.com/tlaziuk>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+/// <reference types="node" />
+
+import { Stream } from "stream";
+
+declare class CombinedStream extends Stream implements CombinedStream.Options {
+    readonly writable: boolean;
+    readonly readable: boolean;
+    readonly dataSize: number;
+    maxDataSize: number;
+    pauseStreams: boolean;
+    append(stream: NodeJS.ReadableStream | NodeJS.WritableStream | Buffer | string): this;
+    write(data: any): void;
+    pause(): void;
+    resume(): void;
+    end(): void;
+    destroy(): void;
+
+    // private properties
+    _released: boolean;
+    // @TODO it should be a type of Array<'delayed-stream' instance | Buffer | string>
+    _streams: Array<Stream | Buffer | string>;
+    _currentStream: Stream | Buffer | string | null;
+    _getNext(): void;
+    _pipeNext(): void;
+    _handleErrors(stream: NodeJS.EventEmitter): void;
+    _reset(): void;
+    _checkDataSize(): void;
+    _updateDataSize(): void;
+    _emitError(error: Error): void;
+
+    // events
+    on(event: "close" | "end" | "resume" | "pause", cb: () => void): this;
+    on(event: "error", cb: (err: Error) => void): this;
+    on(event: "data", cb: (data: any) => void): this;
+    once(event: "close" | "end" | "resume" | "pause", cb: () => void): this;
+    once(event: "error", cb: (err: Error) => void): this;
+    once(event: "data", cb: (data: any) => void): this;
+}
+
+declare namespace CombinedStream {
+    export interface Options {
+        maxDataSize?: number;
+        pauseStreams?: boolean;
+    }
+
+    export function create(options?: Options): CombinedStream;
+
+    export function isStreamLike(stream: any): stream is Stream;
+}
+
+export = CombinedStream;
diff --git a/combined-stream/tsconfig.json b/combined-stream/tsconfig.json
new file mode 100644
index 0000000000..5ffd68770c
--- /dev/null
+++ b/combined-stream/tsconfig.json
@@ -0,0 +1,20 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "target": "es6",
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "combined-stream-tests.ts"
+    ]
+}
diff --git a/combined-stream/tslint.json b/combined-stream/tslint.json
new file mode 100644
index 0000000000..377cc837d4
--- /dev/null
+++ b/combined-stream/tslint.json
@@ -0,0 +1 @@
+{ "extends": "../tslint.json" }