diff --git a/Build.sh b/Build.sh
index 169fcec..b3a9586 100644
--- a/Build.sh
+++ b/Build.sh
@@ -1,5 +1,5 @@
 #!/bin/sh
-# $MirOS: src/bin/mksh/Build.sh,v 1.167 2007/03/19 22:58:19 tg Exp $
+# $MirOS: src/bin/mksh/Build.sh,v 1.168 2007/04/01 01:48:31 tg Exp $
 #-
 # Environment used: CC CFLAGS CPP CPPFLAGS LDFLAGS LIBS NOWARN NROFF TARGET_OS
 # CPPFLAGS recognised: MKSH_SMALL MKSH_ASSUME_UTF8 MKSH_NEED_MKNOD MKSH_NOPWNAM
@@ -21,6 +21,11 @@ if test -d /usr/xpg4/bin/. >/dev/null 2>&1; then
 	export PATH
 fi
 
+if test -n "${ZSH_VERSION+x}" && (emulate sh) >/dev/null 2>&1; then
+	emulate sh
+	NULLCMD=:
+fi
+
 if test -t 1; then
 	bi=`printf '\033[1m'`
 	ui=`printf '\033[4m'`