mysql - Updating table in trigger after update on the same table -

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how can update table's column in trigger after update on same table?
here's trigger:

  create trigger upd_total_votes after update on products_score each row     update         products_score      set         products_score.votes_total =             (select                  (votes_1 + votes_2 + votes_3 + votes_4 + votes_5)                               products_score                               id = new.id)

now when update table like

  update products_score set votes_1 = 5 id = 0

this doesn't work, following:

#1442 - can't update table 'products_score' in stored function/trigger because used statement invoked stored function/trigger.

so how on earth can work?

if change trigger before instead of after this:

create trigger upd_total_votes before update on products_score  each row  begin     set new.votes_total = new.votes_1 + new.votes_2 + new.votes_3 + new.votes_4 + new.votes_5  end ;

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