diff --git a/RELNOTES b/RELNOTES
--- a/RELNOTES
+++ b/RELNOTES
@@ -10,6 +10,11 @@
 
 Changes to this file should not be MFCed.
 
+8ae6247aa966, cf0ede720391d, 205659c43d87bd:
+	The layout of NFS file handles for the tarfs, cd9660, and ext2fs file
+	systems has changed.  An NFS server that exports any of these file
+	systems will need its clients to unmount and remount the exports.
+
 0e8a36a2ab12:
 	Add a new NFS mount option called "mountport" that may be used
 	to specify the port# for the NFS server's Mount protocol.
diff --git a/UPDATING b/UPDATING
--- a/UPDATING
+++ b/UPDATING
@@ -27,6 +27,11 @@
 	world, or to merely disable the most expensive debugging functionality
 	at runtime, run "ln -s 'abort:false,junk:false' /etc/malloc.conf".)
 
+20241215:
+	The layout of NFS file handles for the tarfs, cd9660, and ext2fs file
+	systems has changed.  An NFS server that exports any of these file
+	systems will need its clients to unmount and remount the exports.
+
 20241124:
 	The OpenBSD derived bc and dc implementations and the WITHOUT_GH_BC
 	option that allowed building them instead of the advanced version