diff --git a/types/jquery.fancytree/index.d.ts b/types/jquery.fancytree/index.d.ts
index e2c79b0341..f4e6ac7be8 100644
--- a/types/jquery.fancytree/index.d.ts
+++ b/types/jquery.fancytree/index.d.ts
@@ -1,6 +1,7 @@
 // Type definitions for jquery.fancytree 2.7.0
 // Project: https://github.com/mar10/fancytree
 // Definitions by: Peter Palotas <https://github.com/alphaleonis>
+//                 Mahdi Abedi <https://github.com/abedi-ir>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.3
 
@@ -721,6 +722,8 @@ declare namespace Fancytree {
         restore?(event: JQueryEventObject, data: EventData): void;
         /** `data.node` was selected */
         select?(event: JQueryEventObject, data: EventData): void;
+        /** Enable RTL version, default is false */
+        rtl?: boolean;
     }
 
     interface FancytreeOptions extends FancytreeEvents {