diff --git a/knockout/knockout.d.ts b/knockout/knockout.d.ts
index 9c4e02bd8..71252985d 100644
--- a/knockout/knockout.d.ts
+++ b/knockout/knockout.d.ts
@@ -123,9 +123,14 @@ interface KnockoutBindingContext {
     createChildContext(dataItemOrAccessor: any, dataItemAlias?: any, extendCallback?: Function): any;
 }
 
+interface KnockoutAllBindingsAccessor {
+    (): any;
+    get(bindingName: string): any;
+}
+
 interface KnockoutBindingHandler {
-    init?(element: any, valueAccessor: () => any, allBindingsAccessor: () => any, viewModel: any, bindingContext: KnockoutBindingContext): void;
-    update?(element: any, valueAccessor: () => any, allBindingsAccessor: () => any, viewModel: any, bindingContext: KnockoutBindingContext): void;
+    init?(element: any, valueAccessor: () => any, allBindingsAccessor: KnockoutAllBindingsAccessor, viewModel: any, bindingContext: KnockoutBindingContext): void;
+    update?(element: any, valueAccessor: () => any, allBindingsAccessor: KnockoutAllBindingsAccessor, viewModel: any, bindingContext: KnockoutBindingContext): void;
     options?: any;
 }