diff --git a/swh/loader/package/archive/loader.py b/swh/loader/package/archive/loader.py
--- a/swh/loader/package/archive/loader.py
+++ b/swh/loader/package/archive/loader.py
@@ -89,7 +89,9 @@
 
                - **url**: the artifact url to retrieve filename
 
-               - **artifact's filename version**: artifact's version length
+               - **filename**: optionally, the file's name
+
+               - **version**: artifact's version
 
                - **length**: artifact's length