diff --git a/components/datatable/DataTable.d.ts b/components/datatable/DataTable.d.ts
index f241ae6bf..30ddc03b7 100755
--- a/components/datatable/DataTable.d.ts
+++ b/components/datatable/DataTable.d.ts
@@ -684,7 +684,7 @@ export interface DataTableProps {
     /**
      * One or more field names to use in row grouping.
      */
-    groupRowsBy?: (field: string) => object | string[] | string | undefined;
+    groupRowsBy?: ((field: string) => object) | string[] | string | undefined;
     /**
      * Whether the row groups can be expandable.
      */