diff --git a/kendo-ui/kendo-ui.d.ts b/kendo-ui/kendo-ui.d.ts
index a39438d6b..89f8d30c8 100644
--- a/kendo-ui/kendo-ui.d.ts
+++ b/kendo-ui/kendo-ui.d.ts
@@ -301,7 +301,7 @@ declare module kendo {
 
     class Layout extends View {
         containers: { [selector: string]: ViewContainer; };
-        showIn(selector: string, view: View): void;
+        showIn(selector: string, view: View, transitionClass?: string): void;
     }
 
     class History extends Observable {