diff --git a/CHANGES b/CHANGES
index 49802fcf80..61cdf9490c 100644
--- a/CHANGES
+++ b/CHANGES
@@ -1,3 +1,7 @@
+5318.	[cleanup]	The DNSSEC validation code has been refactored
+			for clarity and to reduce code duplication.
+			[GL #622]
+
 5317.	[func]		A new asynchronous network communications system
 			based on libuv is now used for listening for
 			incoming requests and responding to them. (The
diff --git a/doc/arm/notes-9.15.6.xml b/doc/arm/notes-9.15.6.xml
index c368fdae41..fca186f62a 100644
--- a/doc/arm/notes-9.15.6.xml
+++ b/doc/arm/notes-9.15.6.xml
@@ -46,6 +46,12 @@
           in the future releases. [GL #1265]
         </para>
       </listitem>
+      <listitem>
+	<para>
+	  The DNSSEC validation code has been refactored for clarity and to
+	  reduce code duplication.  [GL #622]
+	</para>
+      </listitem>
     </itemizedlist>
   </section>