diff --git a/bibliotecha.sh b/bibliotecha.sh
index 8ba31c2..da9bb5f 100644
--- a/bibliotecha.sh
+++ b/bibliotecha.sh
@@ -191,7 +191,7 @@ function configure_network_interfaces {
   local ethernet_interface=$(ls /sys/class/net/ | grep en)
   local ethernet_filename="/etc/network/interfaces.d/${ethernet_interface}"
 
-  { echo "auto eth0";
+  { echo "auto ${ethernet_interface}";
     echo "allow-hotplug ${ethernet_interface}";
     echo "iface ${ethernet_interface} inet dhcp"; } > "${ethernet_filename}"