diff --git a/centos/resources/switch/package-systemd.sh b/centos/resources/switch/package-systemd.sh
index 2fb8467..4845b7b 100755
--- a/centos/resources/switch/package-systemd.sh
+++ b/centos/resources/switch/package-systemd.sh
@@ -1,3 +1,5 @@
+#!/bin/sh
+
 rm -f /lib/systemd/system/freeswitch.service
 cp "$(dirname $0)/source/freeswitch.service.package" /lib/systemd/system/freeswitch.service
-cp "$(dirname $0)/source/etc.default.freeswitch" /etc/sysconfig/freeswitch
\ No newline at end of file
+cp "$(dirname $0)/source/etc.default.freeswitch" /etc/sysconfig/freeswitch