diff --git a/Dial-in-Tutorial.md b/Dial-in-Tutorial.md
index af998cf..3f76065 100644
--- a/Dial-in-Tutorial.md
+++ b/Dial-in-Tutorial.md
@@ -39,17 +39,20 @@ Here are the full configuration files for the nodes:
 #### Node1
     peers:
       - gateway.example.com
+    device_type: tun
     shared_key: "mysupersecretkey"
     ifup: "ifconfig $IFNAME 192.168.254.1/16 mtu 1400"
 
 #### Node2
     peers:
       - gateway.example.com
+    device_type: tun
     shared_key: "mysupersecretkey"
     ifup: "ifconfig $IFNAME 192.168.254.2/16 mtu 1400"
 
 #### Gateway
     peers: []
+    device_type: tun
     shared_key: "mysupersecretkey"
     ifup: "ifconfig $IFNAME 192.168.254.254/24 mtu 1400; sysctl -w net.ipv4.ip_forward=1"