encoding again

[Graham Percival]

I'm building 2.5.20 on fink, and I noticed this:

---
Writing fonts to music-glossary.fonts.ps
LANG= makeinfo  --enable-encoding -I ./out 
--output=out/music-glossary.info out/music-glossary.texi
out/music-glossary.texi:7: warning: unrecognized encoding name `utf-8'.
----

mspark:~ gperciva$ makeinfo --version
makeinfo (GNU texinfo) 4.8


Does makeinfo 4.8 not recognize "utf-8" ?  Is this an OSX problem?  
Should
it be "utf8" instead?  Is this a spurious error message?

Cheers,
- Graham