diff --git a/knockout/knockout.d.ts b/knockout/knockout.d.ts
index 8fc87e98d4..d67e96a186 100644
--- a/knockout/knockout.d.ts
+++ b/knockout/knockout.d.ts
@@ -65,7 +65,6 @@ interface KnockoutComputedStatic {
     <T>(): KnockoutComputed<T>;
     <T>(func: () => T, context?: any, options?: any): KnockoutComputed<T>;
     <T>(def: KnockoutComputedDefine<T>, context?: any): KnockoutComputed<T>;
-	(options?: any, context?: any): KnockoutComputed<any>;
 }
 
 interface KnockoutComputed<T> extends KnockoutObservable<T>, KnockoutComputedFunctions<T> {
diff --git a/knockout/tests/knockout-tests.ts b/knockout/tests/knockout-tests.ts
index 82b5aa25c0..2b9253d5c5 100644
--- a/knockout/tests/knockout-tests.ts
+++ b/knockout/tests/knockout-tests.ts
@@ -72,7 +72,7 @@ function test_computed() {
         this.acceptedNumericValue = ko.observable(123);
         this.lastInputWasValid = ko.observable(true);
 
-        this.attemptedValue = ko.computed({
+        this.attemptedValue = ko.computed<number>({
             read: this.acceptedNumericValue,
             write: function (value) {
                 if (isNaN(value))
@@ -284,7 +284,7 @@ function test_more() {
     };
 
     ko.extenders.numeric = function (target, precision) {
-        var result = ko.computed({
+        var result = ko.computed<any>({
             read: target,
             write: function (newValue) {
                 var current = target(),