diff --git a/tns-core-modules/ui/page/page-common.ts b/tns-core-modules/ui/page/page-common.ts
index 08e891ee6..0a3f5f40a 100644
--- a/tns-core-modules/ui/page/page-common.ts
+++ b/tns-core-modules/ui/page/page-common.ts
@@ -200,7 +200,7 @@ export class Page extends ContentView implements dts.Page {
         };
     }
 
-    public onNavigatingTo(context: any, isBackNavigation: boolean, bindingContext: any) {
+    public onNavigatingTo(context: any, isBackNavigation: boolean, bindingContext?: any) {
         this._navigationContext = context;
         
         //https://github.com/NativeScript/NativeScript/issues/731
diff --git a/tns-core-modules/ui/page/page.d.ts b/tns-core-modules/ui/page/page.d.ts
index 34f9d8e32..ff1e791fb 100644
--- a/tns-core-modules/ui/page/page.d.ts
+++ b/tns-core-modules/ui/page/page.d.ts
@@ -227,9 +227,9 @@ declare module "ui/page" {
          * A method called before navigating to the page.
          * @param context - The data passed to the page through the NavigationEntry.context property.
          * @param isBackNavigation - True if the Page is being navigated from using the Frame.goBack() method, false otherwise.
-         * @param bindingContext - An object to become the binding context of the page navigating to.
+         * @param bindingContext - An object to become the binding context of the page navigating to. Optional.
          */
-        onNavigatingTo(context: any, isBackNavigation: boolean, bindingContext: any): void;
+        onNavigatingTo(context: any, isBackNavigation: boolean, bindingContext?: any): void;
 
         /**
          * A method called after navigated to the page.