diff --git a/packages/viewer/src/modules/tree/RenderTree.ts b/packages/viewer/src/modules/tree/RenderTree.ts
index ac8d597ac..069c15591 100644
--- a/packages/viewer/src/modules/tree/RenderTree.ts
+++ b/packages/viewer/src/modules/tree/RenderTree.ts
@@ -26,7 +26,7 @@ export class RenderTree {
   }
 
   public buildRenderTree() {
-    this.tree.walk((node: TreeNode): boolean => {
+    this.root.walk((node: TreeNode): boolean => {
       const rendeNode = this.buildRenderNode(node)
       node.model.renderView = rendeNode ? new NodeRenderView(rendeNode) : null
       this.applyTransforms(node)
@@ -35,7 +35,7 @@ export class RenderTree {
   }
 
   public buildRenderTreeAsync(priority: number): Promise<boolean> {
-    const p = this.tree.walkAsync(
+    const p = this.root.walkAsync(
       (node: TreeNode): boolean => {
         const rendeNode = this.buildRenderNode(node)
         node.model.renderView = rendeNode ? new NodeRenderView(rendeNode) : null