diff --git a/src/Umbraco.Web.UI.Client/src/packages/core/store/store-connector.ts b/src/Umbraco.Web.UI.Client/src/packages/core/store/store-connector.ts
index b2d9a85f04..0a2c0382e6 100644
--- a/src/Umbraco.Web.UI.Client/src/packages/core/store/store-connector.ts
+++ b/src/Umbraco.Web.UI.Client/src/packages/core/store/store-connector.ts
@@ -9,7 +9,7 @@ export class UmbStoreConnector<StoreType, ConnectedStoreType> {
 	#store: UmbStore<StoreType>;
 	#connectedStore?: UmbStore<ConnectedStoreType>;
 	#onNewStoreItem: (item: ConnectedStoreType) => StoreType;
-	#onUpdateStoreItem: (item: ConnectedStoreType) => StoreType;
+	#onUpdateStoreItem: (item: ConnectedStoreType) => Partial<StoreType>;
 
 	constructor(
 		host: UmbControllerHost,