diff --git a/kendo-ui/kendo-ui.d.ts b/kendo-ui/kendo-ui.d.ts
index bd9f5026e..8dbcca12d 100644
--- a/kendo-ui/kendo-ui.d.ts
+++ b/kendo-ui/kendo-ui.d.ts
@@ -4461,7 +4461,7 @@ declare namespace kendo.ui {
         scrollable?: GridScrollable;
         selectable?: boolean|string;
         sortable?: GridSortable;
-        toolbar?: GridToolbarItem[];
+        toolbar?: string | ((...args:any[]) => string) | GridToolbarItem[];
         cancel?(e: GridCancelEvent): void;
         change?(e: GridChangeEvent): void;
         columnHide?(e: GridColumnHideEvent): void;