diff --git a/pcengines/apu/default.nix b/pcengines/apu/default.nix
index f59f35a..521887f 100644
--- a/pcengines/apu/default.nix
+++ b/pcengines/apu/default.nix
@@ -1,3 +1,8 @@
 {
   boot.kernelParams = [ "console=ttyS0,115200n8" ];
+  boot.loader.grub.extraConfig = "
+    serial --speed=115200 --unit=0 --word=8 --parity=no --stop=1
+    terminal_input serial
+    terminal_output serial
+  ";
 }