Brooks Cambium “rivet” missing

Wheeling my bike out of the shed this morning, I was surprised to see that my Brooks Cambium C17 saddle was missing one of the four rivets at its rear; the one at the right. It must have come out in the dark on the way home last week. On the Cambium these rivets are in fact nuts, with a torx bolt underneath fastening them in. I thought this was a nice feature when I brought the saddle!

So if you have one of these saddles yourself, you might want to check that the bolts are tight, and / or put some thread lock on them.