Cancel delete vote

For closing votes, before a question is closed (5 votes) I can cancel my closing vote (after which I can't vote anymore).

After a deletion vote (of a closed question with score $$\le -3$$), I tried to cancel my deletion vote (the question is not yet deleted) but it doesn't seem to be doable. Is this a bug or is it on purpose (I see no serious reason)? or is there some way to cancel my deletion vote I would have missed?