diff --git a/src/Umbraco.Web.UI.Client/libs/repository/data-source/tree-data-source.interface.ts b/src/Umbraco.Web.UI.Client/libs/repository/data-source/tree-data-source.interface.ts
index 2a8999a88c..ae57ef57af 100644
--- a/src/Umbraco.Web.UI.Client/libs/repository/data-source/tree-data-source.interface.ts
+++ b/src/Umbraco.Web.UI.Client/libs/repository/data-source/tree-data-source.interface.ts
@@ -1,6 +1,6 @@
 import type { DataSourceResponse } from '@umbraco-cms/backoffice/repository';
 
-export interface UmbTreeDataSource<PagedItemsType, ItemsType> {
+export interface UmbTreeDataSource<PagedItemsType = any, ItemsType = any> {
 	getRootItems(): Promise<DataSourceResponse<PagedItemsType>>;
 	getChildrenOf(parentUnique: string): Promise<DataSourceResponse<PagedItemsType>>;
 	getItems(unique: Array<string>): Promise<DataSourceResponse<Array<ItemsType>>>;