DB Error: syntax error

SELECT d.*, t.name_fr_FR as theme, g.type as doctype, a.name as aut_name, a.firstname as aut_firstname, a.pseudo as aut_pseudo, COUNT(dc.rate) as rate_nbr, ROUND(AVG(dc.rate)) as rate_avg, e.raison_sociale as editeur, e.logo as editeur_logo FROM doc as d LEFT JOIN auteur as a ON a.id_auteur = d.id_auteur LEFT JOIN doc_comment as dc ON dc.id_doc = d.id_doc LEFT JOIN prod_format AS f ON f.id_format=d.id_format AND dc.rate IS NOT NULL LEFT JOIN doctype as g ON g.id_doctype = d.id_doctype LEFT JOIN theme as t ON t.id_theme = d.id_theme LEFT JOIN editeur as e ON e.id_editeur = d.id_editeur WHERE d.id_plateforme IN (0,3,2) AND d.step IN(910,920,930,950,960,990) AND (d.private IS NULL OR d.private = '0') AND d.id_plateforme_pays IN ( 4, 5, 7 ) GROUP BY d.id_doc ORDER BY validation_date DESC LIMIT -16, 16 [nativecode=1064 ** You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '-16, 16' at line 23]