diff --git a/types/kendo-ui/index.d.ts b/types/kendo-ui/index.d.ts
index 4f5f6b5bf5..f44c31d1ef 100644
--- a/types/kendo-ui/index.d.ts
+++ b/types/kendo-ui/index.d.ts
@@ -7025,7 +7025,7 @@ declare namespace kendo.ui {
         name?: string;
         autoHide?: boolean;
         animation?: boolean|TooltipAnimation;
-        content?: TooltipContent;
+        content?: string | TooltipContent | ((e: any) => string);
         callout?: boolean;
         filter?: string;
         iframe?: boolean;