diff --git a/lib/jasmine.async.d.ts b/lib/jasmine.async.d.ts
new file mode 100644
index 0000000..82822ff
--- /dev/null
+++ b/lib/jasmine.async.d.ts
@@ -0,0 +1,13 @@
+
+// expose the AsyncSpec object
+declare var AsyncSpec: asyncjasmine.AsyncSpec;
+
+declare module asyncjasmine {
+
+    interface AsyncSpec {
+        new (spec: any);
+        beforeEach(block: (done: Function) => void): void;
+        afterEach(block: (done: Function) => void): void;
+        it(description: string, block: (done: Function) => void): void;
+    }
+}