diff --git a/mkunxarc.sh b/mkunxarc.sh
index ad6c3e90..34aee8b2 100755
--- a/mkunxarc.sh
+++ b/mkunxarc.sh
@@ -1,4 +1,4 @@
-#!/bin/bash 
+#!/bin/sh
 
 # Build a Unix source distribution from the PuTTY CVS area.
 #