[MiNT] Wikitools - w2u error

[m0n0 <ole@monochrom.net>]

Hello,

I was trying to convert some wiki page to udo. But I get the following 
error when running>

./w2u ./XaAES.xml

awk: w2u.awk: line 566: function fprintf never defined


where to get fprintf =) ?

Greets,
m