make html not working

Hy,

Looks like 'make html' in documentation is using 'db2hml -u' which
is not working on my system.
If I remove the '-u' from the Makefile it works ok. Don't know what
the '-u' option is for though.

ERROR IS:

merlin@Merlin:/usr/tmp/work/bld/wine/wine/documentation> make html
db2html -u wine-devel.sgml
Try 'db2html --help' for more information.
make: *** [wine-devel.html] Fehler 1

MY DB2HML VERSION:

merlin@Merlin:/usr/tmp/work/bld/wine/wine/documentation> db2html --version
db2html - docbook-toys 1.51.0

PROBLEMATIC LINE IN Makefile:

$(DB2HTML) -u $<