diff --git a/Build.sh b/Build.sh
index 6187caa..e2b30b1 100644
--- a/Build.sh
+++ b/Build.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-srcversion='$MirOS: src/bin/mksh/Build.sh,v 1.369 2008/11/10 20:25:04 tg Exp $'
+srcversion='$MirOS: src/bin/mksh/Build.sh,v 1.370 2008/11/11 21:52:51 tg Exp $'
 #-
 # Environment used: CC CFLAGS CPPFLAGS LDFLAGS LIBS NOWARN NROFF TARGET_OS
 # CPPFLAGS recognised:	MKSH_SMALL MKSH_ASSUME_UTF8 MKSH_NOPWNAM MKSH_NOVI
@@ -378,6 +378,14 @@ UWIN*)
 	;;
 esac
 
+case " $CPPFLAGS " in
+*\ -DMKSH_ASSUME_UTF8=0\ *)
+	;;
+*\ -DMKSH_ASSUME_UTF8*)
+	: ${HAVE_SETLOCALE_CTYPE=0}
+	;;
+esac
+
 if test -n "$warn"; then
 	echo "Warning: mksh has not yet been ported to or tested on your" >&2
 	echo "operating system '$TARGET_OS'$warn. If you can provide" >&2