diff --git a/ccserver/objectsdb.py b/ccserver/objectsdb.py
index fdea330726376bea15347e2a65b54e813f84fa56..61ddc7fee3d2713231e4abb5db22c7856ebbdc8e 100644
--- a/ccserver/objectsdb.py
+++ b/ccserver/objectsdb.py
@@ -224,6 +224,12 @@ class ObjectsDB(object):
         '''
         Calculate the list of tags to request for a client, and send the
         request to the client.
+
+        :param obj: the object to update
+        :param tags: the tags to update on the object
+        :param tags_novalue: the tags to update (do not fetch values) on the
+            object
+        :param only_udt: only update the user defined tags
         '''
 
         parent = obj.get('__parent')