diff --git a/knockout/knockout.d.ts b/knockout/knockout.d.ts
index 3c452dede..703f2b48c 100644
--- a/knockout/knockout.d.ts
+++ b/knockout/knockout.d.ts
@@ -53,7 +53,7 @@ interface KnockoutSubscription {
 }
 
 interface KnockoutSubscribable<T> extends KnockoutSubscribableFunctions<T> {
-	subscribe(callback: (object: any) => void, target?: any, event?: string): KnockoutSubscription;
+    subscribe(callback: (param : any) => void, target?: any, event?: string): KnockoutSubscription;
 	subscribe<TEvent>(callback: (newValue: TEvent) => void, target: any, event: string): KnockoutSubscription;
 	extend(requestedExtenders: { [key: string]: any; }): KnockoutSubscribable<T>;
 	getSubscriptionsCount(): number;
@@ -83,7 +83,25 @@ interface KnockoutObservableArrayStatic {
     <T>(value?: T[]): KnockoutObservableArray<T>;
 }
 
-interface KnockoutObservableArray<T> extends KnockoutObservable<T[]>, KnockoutObservableArrayFunctions<T> {
+interface KnockoutObservableProperties<T>{
+    (): T;
+    (value: T): void;
+
+    peek(): T;
+    valueHasMutated?:{(): void;};
+    valueWillMutate?:{(): void;};
+}
+
+interface KnockoutObservableArray<T> extends KnockoutSubscribable<T[]>, KnockoutObservableProperties<T[]>,KnockoutObservableArrayFunctions<T> {
+    subscribe(callback: (param : T[]) => void, target?: any, event?: string): KnockoutSubscription;
+
+    subscribe(callback: (param : T[]) => void, target: any, event: string): KnockoutSubscription;
+    subscribe(callback: (param : T[]) => void, target: any, event: 'change'): KnockoutSubscription;
+    subscribe(callback: (param : T[]) => void, target: any, event: 'beforeChange'): KnockoutSubscription;
+
+    subscribe(callback: (changes : KnockoutArrayChange<T>[]) => void, target: any, event: string): KnockoutSubscription;
+    subscribe(callback: (changes : KnockoutArrayChange<T>[]) => void, target: any, event: 'arrayChange'): KnockoutSubscription;
+
     extend(requestedExtenders: { [key: string]: any; }): KnockoutObservableArray<T>;
 }
 
@@ -93,14 +111,8 @@ interface KnockoutObservableStatic {
     <T>(value?: T): KnockoutObservable<T>;
 }
 
-interface KnockoutObservable<T> extends KnockoutSubscribable<T>, KnockoutObservableFunctions<T> {
-	(): T;
-	(value: T): void;
-
-	peek(): T;
-	valueHasMutated?:{(): void;};
-	valueWillMutate?:{(): void;};
-
+interface KnockoutObservable<T> extends KnockoutSubscribable<T>, KnockoutObservableProperties<T>, KnockoutObservableFunctions<T> {
+    subscribe(callback: (newValue : T) => void, target?: any, event?: string): KnockoutSubscription;
     extend(requestedExtenders: { [key: string]: any; }): KnockoutObservable<T>;
 }