diff --git a/UPDATING b/UPDATING
--- a/UPDATING
+++ b/UPDATING
@@ -27,6 +27,13 @@
 	world, or to merely disable the most expensive debugging functionality
 	at runtime, run "ln -s 'abort:false,junk:false' /etc/malloc.conf".)
 
+20250521:
+	Support for Secure RPC DES authentication has been removed.
+	The keyserv(8) daemon was already removed, but support for it in libc
+	has also been removed, so if you somehow still had keyserv installed,
+	it will now stop working.  There is no workaround for this.  Removing
+	DES is considered a feature.
+
 20250515:
 	Commit 772258c89f28 changed the internal API between the nfscommon
 	and nfscl modules.  Both need to be built from updated sources.