diff --git a/openvpn-install.sh b/openvpn-install.sh
index 1e3fbf1..635746a 100644
--- a/openvpn-install.sh
+++ b/openvpn-install.sh
@@ -33,7 +33,7 @@ if [[ -e /etc/debian_version ]]; then
 	OS=debian
 	GROUPNAME=nogroup
 	RCLOCAL='/etc/rc.local'
-elif [[ -e /etc/centos-release || -e /etc/redhat-release ]]; then
+elif [[ -e /etc/centos-release || -e /etc/redhat-release || /etc/system-release ]]; then
 	OS=centos
 	GROUPNAME=nobody
 	RCLOCAL='/etc/rc.d/rc.local'
@@ -418,4 +418,4 @@ verb 3" > /etc/openvpn/client-common.txt
 	echo ""
 	echo "Your client configuration is available at" ~/"$CLIENT.ovpn"
 	echo "If you want to add more clients, you simply need to run this script again!"
-fi
\ No newline at end of file
+fi