diff --git a/Build.sh b/Build.sh
index 153c632..b536275 100644
--- a/Build.sh
+++ b/Build.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-srcversion='$MirOS: src/bin/mksh/Build.sh,v 1.536 2012/04/01 17:48:24 tg Exp $'
+srcversion='$MirOS: src/bin/mksh/Build.sh,v 1.537 2012/04/06 12:57:53 tg Exp $'
 #-
 # Copyright (c) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
 #		2011, 2012
@@ -466,6 +466,8 @@ BeOS)
 		oswarn="$oswarn${nl}itself in a second stage"
 		;;
 	esac
+	# BeOS has no real tty either
+	add_cppflags -DMKSH_UNEMPLOYED
 	;;
 BSD/OS)
 	: ${HAVE_SETLOCALE_CTYPE=0}
@@ -1369,7 +1371,7 @@ else
 		#define EXTERN
 		#define MKSH_INCLUDES_ONLY
 		#include "sh.h"
-		__RCSID("$MirOS: src/bin/mksh/Build.sh,v 1.536 2012/04/01 17:48:24 tg Exp $");
+		__RCSID("$MirOS: src/bin/mksh/Build.sh,v 1.537 2012/04/06 12:57:53 tg Exp $");
 		int main(void) { printf("Hello, World!\n"); return (0); }
 EOF
 	case $cm in