diff --git a/rx.js/rx-lite.d.ts b/rx.js/rx-lite.ts
similarity index 100%
rename from rx.js/rx-lite.d.ts
rename to rx.js/rx-lite.ts
diff --git a/rx.js/rx.async-lite.d.ts b/rx.js/rx.async-lite.ts
similarity index 100%
rename from rx.js/rx.async-lite.d.ts
rename to rx.js/rx.async-lite.ts
diff --git a/rx.js/rx.async.d.ts b/rx.js/rx.async.d.ts
index f345da7d95..45bf452364 100644
--- a/rx.js/rx.async.d.ts
+++ b/rx.js/rx.async.d.ts
@@ -5,7 +5,7 @@
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
 
 ///<reference path="rx.d.ts" />
-///<reference path="rx.async-lite.d.ts" />
+///<reference path="rx.async-lite.ts" />
 
 declare module Rx {
     interface ObservableStatic {
diff --git a/rx.js/rx.binding-lite.d.ts b/rx.js/rx.binding-lite.ts
similarity index 100%
rename from rx.js/rx.binding-lite.d.ts
rename to rx.js/rx.binding-lite.ts
diff --git a/rx.js/rx.binding.d.ts b/rx.js/rx.binding.d.ts
index d986537198..505522e38d 100644
--- a/rx.js/rx.binding.d.ts
+++ b/rx.js/rx.binding.d.ts
@@ -5,7 +5,7 @@
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
 
 ///<reference path="rx.d.ts" />
-///<reference path="rx.binding-lite.d.ts" />
+///<reference path="rx.binding-lite.ts" />
 
 declare module Rx {
 	export interface Observable<T> {
diff --git a/rx.js/rx.d.ts b/rx.js/rx.d.ts
index 0b3b3cdf71..2cf1d38b8b 100644
--- a/rx.js/rx.d.ts
+++ b/rx.js/rx.d.ts
@@ -4,7 +4,7 @@
 // Definitions by: Igor Oleinikov <https://github.com/Igorbek>
 // Definitions: https://github.com/borisyankov/DefinitelyTyped
 
-///<reference path="rx-lite.d.ts"/>
+///<reference path="rx-lite.ts"/>
 
 declare module Rx {
 	export interface IScheduler {