alias generated for taxonomy/term/[term]/0 instead of taxonomy/term/[term]/

pathauto_taxonomy.inc , line 77

$src = 'taxonomy/term/'.$category->tid.'/0';

So, alias generated for
'taxonomy/term/5/0'
but drupal searches for alias for 'taxonomy/term/5', and doesn't find it, and I get non-aliased urls on my site.
I missed something or it is pathauto bug?

P.S.
changing code to

$src = 'taxonomy/term/'.$category->tid;

solves the problem.