diff --git a/bingmaps/Microsoft.Maps.d.ts b/bingmaps/Microsoft.Maps.d.ts
index e01db13b3..238caa359 100644
--- a/bingmaps/Microsoft.Maps.d.ts
+++ b/bingmaps/Microsoft.Maps.d.ts
@@ -390,11 +390,10 @@ declare module Microsoft.Maps {
     }
 
     export interface PolylineOptions {
-
-        strokeColor: Color;
-        strokeDashArray: string;
-        strokeThickness: number;
-        visible: boolean;
+        strokeColor?: Color;
+        strokeDashArray?: string;
+        strokeThickness?: number;
+        visible?: boolean;
     }
 
     export class Polygon implements Entity {
@@ -422,11 +421,12 @@ declare module Microsoft.Maps {
     }
 
     export interface PolygonOptions {
-
-        strokeColor: Color;
-        strokeDashArray: string;
-        strokeThickness: number;
-        visible: boolean;
+        fillColor?: Color;
+        infoBox?: Infobox;
+        strokeColor?: Color;
+        strokeDashArray?: string;
+        strokeThickness?: number;
+        visible?: boolean;
     }
 
     export class Pushpin implements Entity {
@@ -570,4 +570,4 @@ declare module Microsoft.Maps {
     export function loadModule(moduleKey: string, options: ModuleOptions): void;
     export function moduleLoaded(moduleKey: string): void;
     export function registerModule(moduleKey: string, scriptUrl: string, options?: ModuleOptions): void;
-}
\ No newline at end of file
+}