diff --git a/index.d.ts b/index.d.ts
index 950ecfda8..371fd1074 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -258,7 +258,8 @@ declare namespace RNRF {
     rightButtonImage?: ReactNative.Image,
     rightButtonIconStyle?: ReactNative.ViewStyle,
     rightButtonStyle?: ReactNative.ViewStyle,
-    rightButtonTextStyle?: ReactNative.TextStyle
+    rightButtonTextStyle?: ReactNative.TextStyle,
+    backAndroidHandler? : Function
   }
   export class Router extends React.Component<RouterProps, {}>{ }