diff --git a/docs/index.md b/docs/index.md
index b8f7ed7..1d97c81 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -401,7 +401,7 @@ We then configure the ethernet interface. We put the following in
 `/etc/network/interfaces.d/enx78e7d1ea46da`:
 
 ```bash
-auto eth0
+auto enx78e7d1ea46da
 allow-hotplug enx78e7d1ea46da
 iface enx78e7d1ea46da inet dhcp
 ```