diff --git a/new-wg.sh b/new-wg.sh
index f0bc1a7..c838b46 100644
--- a/new-wg.sh
+++ b/new-wg.sh
@@ -1,5 +1,10 @@
 #! /usr/bin/env bash
 
+if [ $(id -u) -ne 0 ]; then
+	echo "[!!] This program must be run as root"
+	exit -1
+fi
+
 function usage()
 {
         echo "usage: $(basename $0) [-h] [-i interface] [-d nameserver] [-a address]"
@@ -19,7 +24,7 @@ function checks()
 
         # Si aucun serveur DNS n'a ete renseigne, on prend le premier du resolv.conf
         if [ ${#nameserver} -eq 0 ]; then
-                namerserver="$(sed -n -r "s|nameserver (\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}).*|\1|p" /etc/resolv.conf | head -1)"
+                nameserver="$(sed -n -r "s|nameserver (\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3}).*|\1|p" /etc/resolv.conf | head -1)"
         fi
         # Si aucun nom de domaine ou adresse IP est resignee, on prend le nom de domaine complet
         # du server
@@ -53,7 +58,7 @@ interface="wg0"
 nameserver=""
 serv_addr=""
 
-opts=":hida"
+opts=":i:d:a:h"
 while getopts "$opts" arg; do
         case "$arg" in
                 h)