Finder: why is a *.wmv movie a "document" and not a movie? Howto correct?

See screen shot of my Finder settings all folders and movies (flv, divx, mkv and mov) are correct categorized, only *.wmv file is a document. Should be movie. Howto correct that? > ls -l@ *.wmv -rw-r--r--@ 1 john staff 224665155 Jun 12 17:35 sweet-cat-imgur.wmv com.apple.quarantine 26