diff --git a/pybis/src/python/pybis/definitions.py b/pybis/src/python/pybis/definitions.py
index 7f196cca57d014196c28f3d5bcfd1f1bd33e3837..c58394377fd167cd4c7dfa367b77ce62b1ad6d80 100644
--- a/pybis/src/python/pybis/definitions.py
+++ b/pybis/src/python/pybis/definitions.py
@@ -207,7 +207,7 @@ def openbis_definitions(entity):
         "tag": {
             "attrs_new": "code description".split(),
             "attrs_up": "description".split(),
-            "attrs": "permId code description registrationDate".split(),
+            "attrs": "permId code description registrationDate owner".split(),
             "multi": "".split(),
             "identifier": "tagId",
         },