diff --git a/nixops/rpi-server.nix b/nixops/rpi-server.nix
index b6e6751..7f0dba3 100644
--- a/nixops/rpi-server.nix
+++ b/nixops/rpi-server.nix
@@ -11,6 +11,7 @@
   boot.loader.grub.enable = false;
   boot.loader.generic-extlinux-compatible.enable = true;
   boot.kernelParams = ["cma=64M"]; # work around https://github.com/raspberrypi/linux/issues/3208
+  boot.kernelPackages = pkgs.linuxPackages_rpi4;
   boot.initrd.includeDefaultModules = false;
 
   fileSystems = {