diff --git a/src/backend/InvenTree/part/serializers.py b/src/backend/InvenTree/part/serializers.py
index 19d5b39e56..928759d186 100644
--- a/src/backend/InvenTree/part/serializers.py
+++ b/src/backend/InvenTree/part/serializers.py
@@ -193,6 +193,7 @@ class CategoryTree(InvenTree.serializers.InvenTreeModelSerializer):
             'name',
             'description',
             'parent',
+            'tree_id',
             'level',
             'icon',
             'structural',