Unknown column 'tmwl' in 'where clause'

SELECT COUNT(id) FROM forum_topics WHERE forum_id = 21 AND top = 0 AND special_id = tmwl AND in_recycle = 0<div class='frm err'>
<div class='hcl'>
<span class='htt'></span>
</div>
<div class='ccl'>
<p>[error string missing]</p>
<p>SELECT * FROM forum_topics WHERE forum_id = 21 AND top = 0 AND special_id = tmwl AND in_recycle = 0 ORDER BY lastdatetime DESC LIMIT 0, 25</p>
</div>
</div>