Hi, Also, 'perl -V:libperl' reports 'libperl511.a'. Here's a patch to the win32/makefile.mk that produces a conventional build: ########################### --- makefile.mk_orig Thu Apr 15 17:40:58 2010 +++ makefile.mk Mon May 3 15:14:44 2010 @@ -838,8 +838,8 @@ CFGSH_TMPL = config.gc CFGH_TMPL = config_H.gc .ENDIF -PERLIMPLIB = ..\libperl511$(a) -PERLSTATICLIB = ..\libperl511s$(a) +PERLIMPLIB = ..\libperl512$(a) +PERLSTATICLIB = ..\libperl512s$(a) .ELSE ########################### Apologies if this is an already-known/already-fixed bug. Cheers, RobThread Next