diff --git a/types/stdout-stream/index.d.ts b/types/stdout-stream/index.d.ts
new file mode 100644
index 0000000000..403bcae840
--- /dev/null
+++ b/types/stdout-stream/index.d.ts
@@ -0,0 +1,16 @@
+// Type definitions for stdout-stream 1.4
+// Project: https://github.com/mafintosh/stdout-stream#readme
+// Definitions by: Junxiao Shi <https://github.com/yoursunny>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+/// <reference types="node" />
+import { Writable } from "stream";
+
+interface StdoutStream extends Writable {
+    readonly _isStdio: true;
+    readonly isTTY: boolean;
+}
+
+declare var stdout: StdoutStream;
+
+export = stdout;
diff --git a/types/stdout-stream/stdout-stream-tests.ts b/types/stdout-stream/stdout-stream-tests.ts
new file mode 100644
index 0000000000..c5b4489029
--- /dev/null
+++ b/types/stdout-stream/stdout-stream-tests.ts
@@ -0,0 +1,10 @@
+import stdout = require("stdout-stream");
+
+stdout.write("hello");
+stdout.end();
+
+// $ExpectType true
+stdout._isStdio;
+
+// $ExpectType boolean
+stdout.isTTY;
diff --git a/types/stdout-stream/tsconfig.json b/types/stdout-stream/tsconfig.json
new file mode 100644
index 0000000000..2df4f78ff9
--- /dev/null
+++ b/types/stdout-stream/tsconfig.json
@@ -0,0 +1,23 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictFunctionTypes": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "stdout-stream-tests.ts"
+    ]
+}
diff --git a/types/stdout-stream/tslint.json b/types/stdout-stream/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/stdout-stream/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }