diff --git a/rx.js/rx-lite.ts b/rx.js/rx-lite.ts
index 201e7143f..c0a27c3c4 100644
--- a/rx.js/rx-lite.ts
+++ b/rx.js/rx-lite.ts
@@ -320,6 +320,7 @@ declare module Rx {
 		create<T>(subscribe: (observer: Observer<T>) => IDisposable): Observable<T>;
 		createWithDisposable<T>(subscribe: (observer: Observer<T>) => IDisposable): Observable<T>;
 		defer<T>(observableFactory: () => Observable<T>): Observable<T>;
+		defer<T>(observableFactory: () => IPromise<T>): Observable<T>;
 		empty<T>(scheduler?: IScheduler): Observable<T>;
 		fromArray<T>(array: T[], scheduler?: IScheduler): Observable<T>;
 		fromArray<T>(array: { length: number;[index: number]: T; }, scheduler?: IScheduler): Observable<T>;
@@ -360,9 +361,13 @@ declare module Rx {
 		throwException<T>(exception: any, scheduler?: IScheduler): Observable<T>;	// alias for throw
 
 		catch<T>(sources: Observable<T>[]): Observable<T>;
+		catch<T>(sources: IPromise<T>[]): Observable<T>;
 		catchException<T>(sources: Observable<T>[]): Observable<T>;	// alias for catch
+		catchException<T>(sources: IPromise<T>[]): Observable<T>;	// alias for catch
 		catch<T>(...sources: Observable<T>[]): Observable<T>;
+		catch<T>(...sources: IPromise<T>[]): Observable<T>;
 		catchException<T>(...sources: Observable<T>[]): Observable<T>;	// alias for catch
+		catchException<T>(...sources: IPromise<T>[]): Observable<T>;	// alias for catch
 		concat<T>(...sources: Observable<T>[]): Observable<T>;
 		concat<T>(...sources: IPromise<T>[]): Observable<T>;
 		concat<T>(sources: Observable<T>[]): Observable<T>;