diff --git a/nixos/modules/system/boot/systemd/oomd.nix b/nixos/modules/system/boot/systemd/oomd.nix
index 2697b3207ee2..000b18c01609 100644
--- a/nixos/modules/system/boot/systemd/oomd.nix
+++ b/nixos/modules/system/boot/systemd/oomd.nix
@@ -61,6 +61,7 @@ in {
     };
     systemd.user.units."slice" = lib.mkIf cfg.enableUserSlices {
       text = ''
+        [Slice]
         ManagedOOMMemoryPressure=kill
         ManagedOOMMemoryPressureLimit=80%
       '';