diff --git a/CHANGES.rst b/CHANGES.rst
index 25c7c83..30f0c21 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -4,7 +4,8 @@ Changelog
 0.66 (unreleased)
 -----------------
 
-- Nothing changed yet.
+- Avoid an error if category root folder does not exist
+  [mpeeters]
 
 
 0.65 (2024-02-19)
diff --git a/src/collective/iconifiedcategory/indexes.py b/src/collective/iconifiedcategory/indexes.py
index d4d607f..476a77c 100644
--- a/src/collective/iconifiedcategory/indexes.py
+++ b/src/collective/iconifiedcategory/indexes.py
@@ -22,6 +22,6 @@ def content_category_uid(obj):
         return
     try:
         category_object = utils.get_category_object(obj, obj.content_category)
-    except KeyError:
+    except (KeyError, ValueError):
         return _marker
     return category_object.UID()