diff --git a/nixos/doc/manual/release-notes/rl-1703.xml b/nixos/doc/manual/release-notes/rl-1703.xml
index a133630e146..ef55ea05bcd 100644
--- a/nixos/doc/manual/release-notes/rl-1703.xml
+++ b/nixos/doc/manual/release-notes/rl-1703.xml
@@ -77,6 +77,17 @@ following incompatible changes:</para>
      or attribute sets as specified in parsoid's documentation.
     </para>
   </listitem>
+
+  <listitem>
+    <para>
+     <literal>Ntpd</literal> was replaced by
+     <literal>systemd-timesyncd</literal> as default service to synchronize
+     system time with a remote NTP server. The old behavior can be restored
+     setting <literal>services.ntp.enable</literal> to <literal>true</literal>.
+     Upstream time servers for all NTP implementations are now configured using
+     <literal>networking.timeServers</literal>
+   </para>
+  </listitem>
 </itemizedlist>