diff --git a/samples/react/MusicStore/ReactApp/fx/domain-tasks.d.ts b/samples/react/MusicStore/ReactApp/fx/domain-tasks.d.ts
new file mode 100644
index 0000000..33013aa
--- /dev/null
+++ b/samples/react/MusicStore/ReactApp/fx/domain-tasks.d.ts
@@ -0,0 +1,10 @@
+// TODO: Move this on to definitelytyped, and take a dependency on whatwg-fetch
+// so that the 'fetch' function can have the correct type args
+
+declare module 'domain-tasks' {
+    function addTask(task: PromiseLike<any>): void;
+}
+
+declare module 'domain-tasks/fetch' {
+    function fetch(url, options?): Promise<any>;
+}