diff --git a/knockout/knockout.d.ts b/knockout/knockout.d.ts
index 0fbe8cbad3..e3e0cd49e8 100644
--- a/knockout/knockout.d.ts
+++ b/knockout/knockout.d.ts
@@ -275,9 +275,7 @@ interface KnockoutUtils {
 
     arrayFilter<T>(array: T[], predicate: (item: T) => boolean): T[];
 
-    arrayPushAll<T>(array: T[], valuesToPush: T[]): T[];
-
-    arrayPushAll<T>(array: KnockoutObservableArray<T>, valuesToPush: T[]): T[];
+    arrayPushAll<T>(array: T[] | KnockoutObservableArray<T>, valuesToPush: T[]): T[];
 
     extend(target: Object, source: Object): Object;
 
@@ -313,8 +311,8 @@ interface KnockoutUtils {
 
     toggleDomNodeCssClass(node: any, className: string, shouldHaveClass: boolean): void;
 
-    //setTextContent(element: any, textContent: string): void; // NOT PART OF THE MINIFIED API SURFACE (ONLY IN knockout-{version}.debug.js) https://github.com/SteveSanderson/knockout/issues/670
-
+    setTextContent(element: any, textContent: string | KnockoutObservable<string>): void; // IT's PART OF THE MINIFIED API SURFACE https://github.com/knockout/knockout/blob/master/src/utils.js#L599
+    
     setElementName(element: any, name: string): void;
 
     forceRefresh(node: any): void;
@@ -339,9 +337,9 @@ interface KnockoutUtils {
 
     isIe7: boolean;
     
-    objectForEach(obj: any, action: Function): void;
-
-    setPrototypeOf(obj: any, proto: any): void;
+    objectForEach(obj: any, action: (key: any, value: any) => void): void;
+    
+    addOrRemoveItem<T>(array: T[] | KnockoutObservable<T>, value: T, included: T): void;
 }
 
 interface KnockoutArrayChange<T> {