diff --git a/linq/linq.3.0.3-Beta4.d.ts b/linq/linq.3.0.3-Beta4.d.ts
index 2d68d07b1..77c95d123 100755
--- a/linq/linq.3.0.3-Beta4.d.ts
+++ b/linq/linq.3.0.3-Beta4.d.ts
@@ -115,11 +115,11 @@ declare module linqjs {
         elementAt(index: number): any;
         elementAtOrDefault(index: number, defaultValue?: any): any;
         first(predicate?: (element: any, index: number) => boolean): any;
-        firstOrDefault(predicate?: (element: any, index: number) => bool, defaultValue?: any): any;
+        firstOrDefault(predicate?: (element: any, index: number) => boolean, defaultValue?: any): any;
         last(predicate?: (element: any, index: number) => boolean): any;
-        lastOrDefault(predicate?: (element: any, index: number) => bool, defaultValue?: any): any;
+        lastOrDefault(predicate?: (element: any, index: number) => boolean, defaultValue?: any): any;
         single(predicate?: (element: any, index: number) => boolean): any;
-        singleOrDefault(predicate?: (element: any, index: number) => bool, defaultValue?: any): any;
+        singleOrDefault(predicate?: (element: any, index: number) => boolean, defaultValue?: any): any;
         skip(count: number): Enumerable;
         skipWhile(predicate: (element: any, index: number) => boolean): Enumerable;
         take(count: number): Enumerable;
diff --git a/rx.js/rx.js.jquery.d.ts b/rx.js/rx.js.jquery.d.ts
index 2a0b29b27..bfd514631 100644
--- a/rx.js/rx.js.jquery.d.ts
+++ b/rx.js/rx.js.jquery.d.ts
@@ -13,8 +13,8 @@
 declare module JQueryResults {
 
 	export interface eventBase{
-		bubbles: bool;
-		cancelable: bool;
+		bubbles: boolean;
+		cancelable: boolean;
 		type: string;
 		preventDefault(): void;
 		isDefaultPrevented(): boolean;
diff --git a/rx.js/rx.js.time.d.ts b/rx.js/rx.js.time.d.ts
index 698cc300c..f458dadc3 100644
--- a/rx.js/rx.js.time.d.ts
+++ b/rx.js/rx.js.time.d.ts
@@ -22,9 +22,9 @@ declare module Rx {
 	}
 
 	interface IObservable<T> {
-		ifThen(condition: () => bool, thenSource: IObservable<T>): IObservable<T>;
-		ifThen(condition: () => bool, thenSource: IObservable<T>, elseSource: IObservable<T>): IObservable<T>;
-		ifThen(condition: () => bool, thenSource: IObservable<T>, scheduler: IScheduler): IObservable<T>;
+		ifThen(condition: () => boolean, thenSource: IObservable<T>): IObservable<T>;
+		ifThen(condition: () => boolean, thenSource: IObservable<T>, elseSource: IObservable<T>): IObservable<T>;
+		ifThen(condition: () => boolean, thenSource: IObservable<T>, scheduler: IScheduler): IObservable<T>;
 
 		delay(dueTime: number, scheduler?: IScheduler): IObservable<T>;
 		throttle(dueTime: number, scheduler?: IScheduler): IObservable<T>;