diff --git a/src/components/TreeList/TreeList.tsx b/src/components/TreeList/TreeList.tsx
index a31acea0e9..b48fa298d6 100644
--- a/src/components/TreeList/TreeList.tsx
+++ b/src/components/TreeList/TreeList.tsx
@@ -78,6 +78,7 @@ export const TreeList = <T,>({
 
         if (propsRenderItem) {
             return propsRenderItem({
+                id: itemId,
                 data: renderState.data,
                 props: renderState.props,
                 context: renderState.context,
diff --git a/src/components/TreeList/types.ts b/src/components/TreeList/types.ts
index 466bcdec5f..9dbb33aa22 100644
--- a/src/components/TreeList/types.ts
+++ b/src/components/TreeList/types.ts
@@ -12,6 +12,7 @@ import type {
 } from '../useList';
 
 export type TreeListRenderItem<T, P extends {} = {}> = (props: {
+    id: ListItemId;
     data: T;
     // required item props to render
     props: RenderItemProps;
diff --git a/src/unstable.ts b/src/unstable.ts
index 92a4858717..18fdbba59f 100644
--- a/src/unstable.ts
+++ b/src/unstable.ts
@@ -11,6 +11,7 @@ export {
     ListContainer as unstable_ListContainer,
     type ListContainerViewProps as unstable_ListContainerViewProps,
     type ListItemType as unstable_ListItemType,
+    type ListTreeItemType as unstable_ListTreeItemType,
     type ListItemId as unstable_ListItemId,
     type UseListResult as unstable_UseListResult,
     getItemRenderState as unstable_getItemRenderState,