--- Libc/Libc-391/regex/Makefile.inc
+++ Libc/Libc-320/regex/Makefile.inc
@@ -4,13 +4,12 @@
 # regex sources
 .PATH: ${.CURDIR}/regex
 
+CFLAGS+=-DPOSIX_MISTAKE
+
 .include "Makefile.fbsd_begin"
-FBSDMISRCS= regcomp.c regerror.c regexec.c regfree.c
-CFLAGS-regcomp-fbsd.c+= -DPOSIX_MISTAKE
-FBSDHDRS= cclass.h cname.h engine.c regex2.h utils.h
+FBSDSRCS= regcomp.c regerror.c regexec.c regfree.c
+FBSDORIGHDRS= cclass.h cname.h engine.c regex2.h utils.h
 .include "Makefile.fbsd_end"
-
-UNIX03SRCS += regcomp.c
 
 .if ${LIB} == "c"
 .include "Makefile.fbsd_begin"