diff --git a/openvpn-install.sh b/openvpn-install.sh
index f384ddc..062627f 100755
--- a/openvpn-install.sh
+++ b/openvpn-install.sh
@@ -20,7 +20,7 @@ if [[ ! -e /dev/net/tun ]]; then
 fi
 
 
-if grep -q "CentOS release 5" "/etc/redhat-release"; then
+if grep -qs "CentOS release 5" "/etc/redhat-release"; then
 	echo "CentOS 5 is too old and not supported"
 	exit
 fi