diff --git a/rx.js/rx.js.aggregates.d.ts b/rx.js/rx.js.aggregates.d.ts
index 4b2ed300b..36b87612e 100644
--- a/rx.js/rx.js.aggregates.d.ts
+++ b/rx.js/rx.js.aggregates.d.ts
@@ -45,5 +45,8 @@ declare module Rx {
 
 		last(predicate?: (value: T, index: number, source: Observable<T>) => boolean, thisArg?: any): Observable<T>;
 		lastOrDefault(predicate?: (value: T, index: number, source: Observable<T>) => boolean, defaultValue?: T, thisArg?: any): Observable<T>;
+
+		find(predicate: (value: T, index: number, source: Observable<T>) => boolean, thisArg?: any): Observable<T>;
+		findIndex(predicate: (value: T, index: number, source: Observable<T>) => boolean, thisArg?: any): Observable<number>;
 	}
-}
\ No newline at end of file
+}