diff --git a/cps/kobo_sync_status.py b/cps/kobo_sync_status.py
index ee9f0779c..94f1d073a 100644
--- a/cps/kobo_sync_status.py
+++ b/cps/kobo_sync_status.py
@@ -51,6 +51,8 @@ def remove_synced_book(book_id, all=False, session=None):
         ub.session_commit(_session=session)
 
 
+# If state == none, it will toggle the archive state of the passed book_id. 
+# state = true archives it, state = false unarchives it
 def change_archived_books(book_id, state=None, message=None):
     archived_book = ub.session.query(ub.ArchivedBook).filter(and_(ub.ArchivedBook.user_id == int(current_user.id),
                                                                   ub.ArchivedBook.book_id == book_id)).first()