diff --git a/gnutoo-trisquel-netinstall/use-serial-port.sh b/gnutoo-trisquel-netinstall/use-serial-port.sh
index c61f4fb..828f13b 100755
--- a/gnutoo-trisquel-netinstall/use-serial-port.sh
+++ b/gnutoo-trisquel-netinstall/use-serial-port.sh
@@ -1,6 +1,7 @@
 #!/bin/sh
 # Copyright (C) 2023 Denis 'GNUtoo' Carikli
 # SPDX-License-Identifier: GPL-3.0-or-later
+# See /usr/include/linux/input-event-codes.h for the key <-> values
 virsh -c qemu:///system send-key gnutoo-trisquel-netinstall 15 # TAB
 virsh -c qemu:///system send-key gnutoo-trisquel-netinstall 46 # C
 virsh -c qemu:///system send-key gnutoo-trisquel-netinstall 24 # O