diff --git a/CHANGES b/CHANGES
index 47104d87e5..fe143c5fd1 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+6188.	[performance]	Reduce memory consumption by allocating properly
+			sized send buffers for stream-based transports.
+			[GL #4038]
+
 6185.	[func]		Add "ClientQuota" statistics channel counter, which
 			indicates the number of the resolver's spilled queries
 			due to reaching the clients per query quota. [GL !7978]
diff --git a/doc/notes/notes-current.rst b/doc/notes/notes-current.rst
index adec5ced27..b4f461b3e0 100644
--- a/doc/notes/notes-current.rst
+++ b/doc/notes/notes-current.rst
@@ -48,6 +48,10 @@ Bug Fixes
   a delegation from cache was returned to the client. This has now been fixed.
   :gl:`#3950`
 
+- BIND could allocate too big buffers when sending data via
+  stream-based DNS transports, leading to increased memory usage.
+  This has been fixed. :gl:`#4038`
+
 Known Issues
 ~~~~~~~~~~~~