diff --git a/nixos/doc/manual/release-notes/rl-1909.xml b/nixos/doc/manual/release-notes/rl-1909.xml
index b02d99438de0..85ad34f6a66e 100644
--- a/nixos/doc/manual/release-notes/rl-1909.xml
+++ b/nixos/doc/manual/release-notes/rl-1909.xml
@@ -506,12 +506,20 @@
     been removed.
    </para>
   </listitem>
-   <listitem>
-    <para>
-      The <literal>rmilter</literal> package was removed with associated module and options due deprecation by upstream developer.
-      Use <literal>rspamd</literal> in proxy mode instead.
-    </para>
-   </listitem>
+  <listitem>
+   <para>
+    The <literal>rmilter</literal> package was removed with associated module and options due deprecation by upstream developer.
+    Use <literal>rspamd</literal> in proxy mode instead.
+   </para>
+  </listitem>
+  <listitem>
+   <para>
+     systemd cgroup accounting via the
+     <link linkend="opt-systemd.enableCgroupAccounting">systemd.enableCgroupAccounting</link>
+     option is now enabled by default. It now also enables the more recent Block IO and IP accounting
+     features.
+   </para>
+  </listitem>
   </itemizedlist>
  </section>
 </section>
diff --git a/nixos/modules/system/boot/systemd.nix b/nixos/modules/system/boot/systemd.nix
index 5d0783b663d9..2a0360b12cbc 100644
--- a/nixos/modules/system/boot/systemd.nix
+++ b/nixos/modules/system/boot/systemd.nix
@@ -537,7 +537,7 @@ in
     };
 
     systemd.enableCgroupAccounting = mkOption {
-      default = false;
+      default = true;
       type = types.bool;
       description = ''
         Whether to enable cgroup accounting.