diff --git a/doc/arm/notes.xml b/doc/arm/notes.xml
index 43cd33e76f..9d0a2a180a 100644
--- a/doc/arm/notes.xml
+++ b/doc/arm/notes.xml
@@ -126,6 +126,15 @@
 
   <section xml:id="relnotes_bugs"><info><title>Bug Fixes</title></info>
     <itemizedlist>
+      <listitem>
+	<para>
+	  Fixed a bug that was introduced in an earlier development
+	  release which caused multi-packet AXFR and IXFR messages to fail
+	  validation if not all packets contained TSIG records; this
+	  caused interoperability problems with some other DNS
+	  implementations. [RT #45509]
+	</para>
+      </listitem>
       <listitem>
 	<para>
 	  Semicolons are no longer escaped when printing CAA and