diff --git a/mkunxarc.sh b/mkunxarc.sh
index ad6c3e902d8dbabad4423b0b9dbdd4238e310a54..34aee8b234f3c37cf896e6deb7a071a1306c45e1 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.
 #