diff --git a/Build.sh b/Build.sh
index cf004e7..fa8d6c7 100644
--- a/Build.sh
+++ b/Build.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-# $MirOS: src/bin/mksh/Build.sh,v 1.148 2007/01/28 20:05:29 tg Exp $
+# $MirOS: src/bin/mksh/Build.sh,v 1.149 2007/02/02 10:27:21 tg Exp $
 #-
 # Env: CC, CFLAGS, CPP, CPPFLAGS, LDFLAGS, LIBS, NOWARN, NROFF, TARGET_OS
 # CPPFLAGS recognised: MKSH_SMALL MKSH_NOPWNAM
@@ -188,18 +188,16 @@ DragonFly)
 FreeBSD)
 	;;
 GNU/kFreeBSD)
-	# XXX probably the same as Linux?
 	echo Warning: mksh has not yet been ported to $TARGET_OS >&2
 	echo but should work. If you can provide a shell account >&2
 	echo to the developer, the situation may improve. >&2
-	CPPFLAGS="$CPPFLAGS -D_BSD_SOURCE"
+	CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64"
 	;;
 Interix)
 	CPPFLAGS="$CPPFLAGS -D_ALL_SOURCE"
 	;;
 Linux)
-	CPPFLAGS="$CPPFLAGS -D_POSIX_C_SOURCE=2 -D_BSD_SOURCE -D_GNU_SOURCE"
-	CPPFLAGS="$CPPFLAGS -D_FILE_OFFSET_BITS=64"
+	CPPFLAGS="$CPPFLAGS -D_GNU_SOURCE -D_FILE_OFFSET_BITS=64"
 	test def = $s && s=pam
 	: ${HAVE_REVOKE=0}
 	;;