diff --git a/rx.js/rx-lite.d.ts b/rx.js/rx-lite.d.ts
index 3bbdc2faa..dfae2289d 100644
--- a/rx.js/rx-lite.d.ts
+++ b/rx.js/rx-lite.d.ts
@@ -227,6 +227,11 @@ declare module Rx {
 		concat(sources: IPromise<T>[]): Observable<T>;
 		concatAll(): T;
 		concatObservable(): T;	// alias for concatAll
+		concatMap<T2, R>(selector: (value: T, index: number) => Observable<T2>, resultSelector: (value1: T, value2: T2, index: number) => R): Observable<R>;	// alias for selectConcat
+		concatMap<T2, R>(selector: (value: T, index: number) => IPromise<T2>, resultSelector: (value1: T, value2: T2, index: number) => R): Observable<R>;	// alias for selectConcat
+		concatMap<R>(selector: (value: T, index: number) => Observable<R>): Observable<R>;	// alias for selectConcat
+		concatMap<R>(selector: (value: T, index: number) => IPromise<R>): Observable<R>;	// alias for selectConcat
+		concatMap<R>(sequence: Observable<R>): Observable<R>;	// alias for selectConcat
 		merge(maxConcurrent: number): T;
 		merge(other: Observable<T>): Observable<T>;
 		merge(other: IPromise<T>): Observable<T>;
@@ -293,6 +298,12 @@ declare module Rx {
 		flatMap<TResult>(other: Observable<TResult>): Observable<TResult>;	// alias for selectMany
 		flatMap<TResult>(other: IPromise<TResult>): Observable<TResult>;	// alias for selectMany
 
+		selectConcat<T2, R>(selector: (value: T, index: number) => Observable<T2>, resultSelector: (value1: T, value2: T2, index: number) => R): Observable<R>;
+		selectConcat<T2, R>(selector: (value: T, index: number) => IPromise<T2>, resultSelector: (value1: T, value2: T2, index: number) => R): Observable<R>;
+		selectConcat<R>(selector: (value: T, index: number) => Observable<R>): Observable<R>;
+		selectConcat<R>(selector: (value: T, index: number) => IPromise<R>): Observable<R>;
+		selectConcat<R>(sequence: Observable<R>): Observable<R>;
+
 		/**
 		*  Projects each element of an observable sequence into a new sequence of observable sequences by incorporating the element's index and then 
 		*  transforms an observable sequence of observable sequences into an observable sequence producing values only from the most recent observable sequence.