diff --git a/nixos/doc/manual/from_md/release-notes/rl-2305.section.xml b/nixos/doc/manual/from_md/release-notes/rl-2305.section.xml
index 61daeac86a64..15aa99a7c25d 100644
--- a/nixos/doc/manual/from_md/release-notes/rl-2305.section.xml
+++ b/nixos/doc/manual/from_md/release-notes/rl-2305.section.xml
@@ -117,6 +117,16 @@
           <literal>true</literal>, or configure your firewall.
         </para>
       </listitem>
+      <listitem>
+        <para>
+          The Nginx module now validates the syntax of config files at
+          build time. For more complex configurations (using
+          <literal>include</literal> with out-of-store files notably)
+          you may need to disable this check by setting
+          <link linkend="opt-services.nginx.validateConfig">services.nginx.validateConfig</link>
+          to <literal>false</literal>.
+        </para>
+      </listitem>
       <listitem>
         <para>
           The EC2 image module previously detected and automatically
diff --git a/nixos/doc/manual/release-notes/rl-2305.section.md b/nixos/doc/manual/release-notes/rl-2305.section.md
index f9c76b02f891..b00719314e3f 100644
--- a/nixos/doc/manual/release-notes/rl-2305.section.md
+++ b/nixos/doc/manual/release-notes/rl-2305.section.md
@@ -37,6 +37,8 @@ In addition to numerous new and upgraded packages, this release has the followin
 
 - The [services.unifi-video.openFirewall](#opt-services.unifi-video.openFirewall) module option default value has been changed from `true` to `false`. You will need to explicitely set this option to `true`, or configure your firewall.
 
+- The Nginx module now validates the syntax of config files at build time. For more complex configurations (using `include` with out-of-store files notably) you may need to disable this check by setting [services.nginx.validateConfig](#opt-services.nginx.validateConfig) to `false`.
+
 - The EC2 image module previously detected and automatically mounted ext3-formatted instance store devices and partitions in stage-1 (initramfs), storing `/tmp` on the first discovered device. This behaviour, which only catered to very specific use cases and could not be disabled, has been removed. Users relying on this should provide their own implementation, and probably use ext4 and perform the mount in stage-2.
 
 - The EC2 image module previously detected and activated swap-formatted instance store devices and partitions in stage-1 (initramfs). This behaviour has been removed. Users relying on this should provide their own implementation.