diff --git a/streamjs/streamjs-tests.ts b/streamjs/streamjs-tests.ts
new file mode 100644
index 000000000..e5d933851
--- /dev/null
+++ b/streamjs/streamjs-tests.ts
@@ -0,0 +1,11 @@
+// <reference file="streamjs.d.ts" />
+
+var numStream = Stream.make(10, 20);
+numStream = Stream.make([10, 20]);
+numStream = Stream.range(1, 5);
+numStream = Stream.rangeClosed(1, 5);
+
+Stream.generate(function() {
+	return 1;
+});
+Stream.generate(() => 1);
diff --git a/streamjs/streamjs.d.ts b/streamjs/streamjs.d.ts
new file mode 100644
index 000000000..e1fe42536
--- /dev/null
+++ b/streamjs/streamjs.d.ts
@@ -0,0 +1,12 @@
+// Type definitions for streamjs 1.4.0
+// Project: http://streamjs.org/
+// Definitions by: Bence Eros <https://github.com/erosb>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+declare class Stream<T> {
+	static make<T> (...elems: T[]): Stream<T>;
+	static make<T>(elems: T[]): Stream<T>;
+	static range<T>(startInclusive: number, endExclusive: number): Stream<T>;
+	static rangeClosed<T>(startInclusive: number, endInclusive: number): Stream<T>;
+	static generate<T>(supplier: () => T): Stream<T>;
+}