WinPrn unit in Delphi missing?

When I try to use Winprn unit in Delphi, compiler is not able to
find Winprn.dcu . What's wrong? Winprn is in Delphi help, there is, but I can't find winprn.dcu
Did I erased it? Is it missing from distribution?
I wouldn't want to install Delphi again if I don't have to.