diff --git a/types/isstream/index.d.ts b/types/isstream/index.d.ts
new file mode 100644
index 0000000000..2dd8731df1
--- /dev/null
+++ b/types/isstream/index.d.ts
@@ -0,0 +1,39 @@
+// Type definitions for isstream 0.1
+// Project: https://github.com/rvagg/isstream
+// Definitions by: My Self <https://github.com/me>
+// Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
+
+export = isstream;
+
+declare function isstream(obj: any): any;
+
+declare namespace isstream {
+    const prototype: {
+    };
+
+    function isDuplex(obj: any): any;
+
+    function isReadable(obj: any): any;
+
+    function isWritable(obj: any): any;
+
+    namespace isDuplex {
+        const prototype: {
+        };
+
+    }
+
+    namespace isReadable {
+        const prototype: {
+        };
+
+    }
+
+    namespace isWritable {
+        const prototype: {
+        };
+
+    }
+
+}
+
diff --git a/types/isstream/isstream-tests.ts b/types/isstream/isstream-tests.ts
new file mode 100644
index 0000000000..e69de29bb2
diff --git a/types/isstream/tsconfig.json b/types/isstream/tsconfig.json
new file mode 100644
index 0000000000..ddea72dd3e
--- /dev/null
+++ b/types/isstream/tsconfig.json
@@ -0,0 +1,22 @@
+{
+    "compilerOptions": {
+        "module": "commonjs",
+        "lib": [
+            "es6"
+        ],
+        "noImplicitAny": true,
+        "noImplicitThis": true,
+        "strictNullChecks": true,
+        "baseUrl": "../",
+        "typeRoots": [
+            "../"
+        ],
+        "types": [],
+        "noEmit": true,
+        "forceConsistentCasingInFileNames": true
+    },
+    "files": [
+        "index.d.ts",
+        "isstream-tests.ts"
+    ]
+}
diff --git a/types/isstream/tslint.json b/types/isstream/tslint.json
new file mode 100644
index 0000000000..3db14f85ea
--- /dev/null
+++ b/types/isstream/tslint.json
@@ -0,0 +1 @@
+{ "extends": "dtslint/dt.json" }