diff --git a/CHANGES b/CHANGES
index a78c165cc6..2ac3082a60 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,9 @@
+5664.	[func]		Handle a UDP sending error on UDP messages larger
+			than the path MTU; in such a case an empty response is
+			sent back with the TC (TrunCated) bit set. Re-enable
+			setting the DF (Don't Fragment) flag on outgoing
+			UDP sockets. [GL #2790]
+
 5663.	[bug]		Properly handle non-zero OPCODEs when receiving the
 			queries over DoT and DoH channels. [GL #2787]
 
diff --git a/doc/notes/notes-current.rst b/doc/notes/notes-current.rst
index 1aa3a8c3b1..5528fc06b2 100644
--- a/doc/notes/notes-current.rst
+++ b/doc/notes/notes-current.rst
@@ -40,7 +40,10 @@ Removed Features
 Feature Changes
 ~~~~~~~~~~~~~~~
 
-- None.
+- IP fragmentation on outgoing UDP sockets has been disabled.  Errors from
+  sending DNS messages larger than the specified path MTU are properly handled;
+  ``named`` now sends back empty DNS messages with the TC (TrunCated) bit set,
+  forcing the DNS client to fall back to TCP.  :gl:`#2790`
 
 Bug Fixes
 ~~~~~~~~~