diff --git a/src/Umbraco.Web.UI.Client/libs/repository/item-repository.interface.ts b/src/Umbraco.Web.UI.Client/libs/repository/item-repository.interface.ts
index 74395f85de..3f92cb70e8 100644
--- a/src/Umbraco.Web.UI.Client/libs/repository/item-repository.interface.ts
+++ b/src/Umbraco.Web.UI.Client/libs/repository/item-repository.interface.ts
@@ -3,8 +3,8 @@ import { ItemResponseModelBaseModel, ProblemDetailsModel } from '@umbraco-cms/ba
 
 export interface UmbItemRepository<ItemType extends ItemResponseModelBaseModel> {
 	requestItems: (uniques: string[]) => Promise<{
-		data: Array<ItemType> | undefined;
-		error: ProblemDetailsModel | undefined;
+		data?: Array<ItemType> | undefined;
+		error?: ProblemDetailsModel | undefined;
 		asObservable?: () => Observable<Array<ItemType>>;
 	}>;
 	items: (uniques: string[]) => Promise<Observable<Array<ItemType>>>;