diff --git a/captive-portal-login.sh b/captive-portal-login.sh
index c9d0f51..f7b7eba 100644
--- a/captive-portal-login.sh
+++ b/captive-portal-login.sh
@@ -7,6 +7,7 @@
 DNS=$(nmcli -f IP4.DNS dev show wlan0 | awk '{print $2}')
 
 # Temporarily put the DNS resolver in place
+echo "Need sudo permission to work with /etc/resolv.conf"
 sudo cp /etc/resolv.conf /etc/resolv.conf.bk
 echo "# Temporary resolv.conf generated by captive-portal-login.sh" | sudo tee /etc/resolv.conf
 echo "nameserver $DNS" | sudo tee -a /etc/resolv.conf