diff --git a/nixos/doc/manual/release-notes/rl-1709.xml b/nixos/doc/manual/release-notes/rl-1709.xml
index 66b88eab09b..bd999b60013 100644
--- a/nixos/doc/manual/release-notes/rl-1709.xml
+++ b/nixos/doc/manual/release-notes/rl-1709.xml
@@ -11,7 +11,11 @@ has the following highlights: </para>
 
 <itemizedlist>
   <listitem>
-    <para></para>
+    <para>
+      The user handling now keeps track of deallocated UIDs/GIDs. When a user
+      or group is revived, this allows it to be allocated the UID/GID it had before.
+      A consequence is that UIDs and GIDs are no longer reused.
+    </para>
   </listitem>
 
 </itemizedlist>