diff --git a/kendo-ui/kendo-ui.d.ts b/kendo-ui/kendo-ui.d.ts
index bf8a2ec926..edfe747202 100644
--- a/kendo-ui/kendo-ui.d.ts
+++ b/kendo-ui/kendo-ui.d.ts
@@ -8505,7 +8505,7 @@ declare namespace kendo.geometry {
         round(digits: number): kendo.geometry.Matrix;
         multiplyCopy(matrix: kendo.geometry.Matrix): kendo.geometry.Matrix;
         toArray(digits: number): any;
-        toString(digits: number, separator: string): string;
+        toString(digits?: number, separator?: string): string;
 
     }
 
@@ -8551,7 +8551,7 @@ declare namespace kendo.geometry {
         setX(value: number): kendo.geometry.Point;
         setY(value: number): kendo.geometry.Point;
         toArray(digits: number): any;
-        toString(digits: number, separator: string): string;
+        toString(digits?: number, separator?: string): string;
         transform(tansformation: kendo.geometry.Transformation): kendo.geometry.Point;
         transformCopy(tansformation: kendo.geometry.Transformation): kendo.geometry.Point;
         translate(dx: number, dy: number): kendo.geometry.Point;
@@ -19212,7 +19212,7 @@ declare namespace kendo.dataviz.geometry {
         round(digits: number): kendo.geometry.Matrix;
         multiplyCopy(matrix: kendo.geometry.Matrix): kendo.geometry.Matrix;
         toArray(digits: number): any;
-        toString(digits: number, separator: string): string;
+        toString(digits?: number, separator?: string): string;
 
     }