diff --git a/wireguard.md b/wireguard.md
index 5e93c7c..e54e01d 100644
--- a/wireguard.md
+++ b/wireguard.md
@@ -39,7 +39,7 @@ set firewall name INTERNET_LOCAL rule 10 destination port 51820
 ### Configure NAT
 ```sh
 set service nat rule 5010 description 'WireGuard NAT'
-set service nat rule 5010 outbound-interface eth0
+set service nat rule 5010 outbound-interface pppoe0
 set service nat rule 5010 type masquerade
 set service nat rule 5010 source address 10.200.254.0/24
 ```