diff --git a/nixos/doc/manual/release-notes/rl-2009.xml b/nixos/doc/manual/release-notes/rl-2009.xml
index 8701b395576..a4c2719d044 100644
--- a/nixos/doc/manual/release-notes/rl-2009.xml
+++ b/nixos/doc/manual/release-notes/rl-2009.xml
@@ -432,6 +432,11 @@ systemd.services.nginx.serviceConfig.ReadWritePaths = [ "/var/www" ];
      The default output of <literal>buildGoPackage</literal> is now <literal>$out</literal> instead of <literal>$bin</literal>.
    </para>
    </listitem>
+   <listitem>
+   <para>
+     Default algorithm for ZRAM swap was changed to <literal>zstd</literal>.
+   </para>
+   </listitem>
   </itemizedlist>
  </section>
 </section>
diff --git a/nixos/modules/config/zram.nix b/nixos/modules/config/zram.nix
index 5d411c73a56..5e9870bf6b1 100644
--- a/nixos/modules/config/zram.nix
+++ b/nixos/modules/config/zram.nix
@@ -91,7 +91,7 @@ in
       };
 
       algorithm = mkOption {
-        default = "lzo";
+        default = "zstd";
         example = "lz4";
         type = with types; either (enum [ "lzo" "lz4" "zstd" ]) str;
         description = ''