diff --git a/CHANGES b/CHANGES
index 04d07632f1..885e60dfbe 100644
--- a/CHANGES
+++ b/CHANGES
@@ -2,6 +2,9 @@
 			success if errors were found in one view but not in a
 			subsequent one. [GL #1807]
 
+5403.	[func]		Don't set udp recv/send buffer sizes, sockets will
+			use system defaults. [GL #1713]
+
 5402.	[bug]		Enable SO_REUSEADDR on all platforms, and either
 			SO_REUSEPORT_LB on FreeBSD, or SO_REUSEPORT on Linux.
 			[GL !3365]
diff --git a/doc/arm/notes-9.16.3.xml b/doc/arm/notes-9.16.3.xml
index 193c8df4fb..cdff621d8b 100644
--- a/doc/arm/notes-9.16.3.xml
+++ b/doc/arm/notes-9.16.3.xml
@@ -82,6 +82,12 @@
           BIND 9 rwlock implementation. [GL #1753]
         </para>
       </listitem>
+      <listitem>
+        <para>
+          BIND 9 no longer sets the recv and send buffer sizes for sockets, relying
+          on system defaults instead. [GL #1713]
+        </para>
+      </listitem>
       <listitem>
         <para>
           When running on a system with Linux capabilities support,