diff --git a/xCAT/postscripts/mkresolvconf b/xCAT/postscripts/mkresolvconf
index 39cf9c06a..f89476d86 100755
--- a/xCAT/postscripts/mkresolvconf
+++ b/xCAT/postscripts/mkresolvconf
@@ -1,4 +1,4 @@
-#!/bin/sh
+#!/bin/bash
 # IBM(c) 2007 EPL license http://www.eclipse.org/legal/epl-v10.html
 #
 #---------------------------------------------------------------------------