diff --git a/appliance/init b/appliance/init
index 2df5f92ce..50a1dc3bd 100755
--- a/appliance/init
+++ b/appliance/init
@@ -185,6 +185,7 @@ else
     sleep 2
 
     # Get name of the serial port, from console= passed by libguestfs.
+    # XXX Consider using /proc/consoles
     guestfs_serial=$(grep -Eo 'console=[^[:space:]]+' /proc/cmdline |
                      sed s/console=//)