diff --git a/kendo-ui/kendo-ui.d.ts b/kendo-ui/kendo-ui.d.ts
index b283f21c14..29cb1527d6 100644
--- a/kendo-ui/kendo-ui.d.ts
+++ b/kendo-ui/kendo-ui.d.ts
@@ -1282,6 +1282,7 @@ declare namespace kendo.data {
 
     interface DataSourceRequestStartEvent extends DataSourceEvent {
         type?: string;
+        preventDefault(): void;
     }
 
     interface DataSourceRequestEndEvent extends DataSourceEvent {