diff --git a/microsoft/surface/kernel/linux-5.13.4/default.nix b/microsoft/surface/kernel/linux-5.13.4/default.nix
index 7aa0152..fe2b728 100644
--- a/microsoft/surface/kernel/linux-5.13.4/default.nix
+++ b/microsoft/surface/kernel/linux-5.13.4/default.nix
@@ -25,6 +25,12 @@ let
 
         BATTERY_SURFACE = module;
         CHARGER_SURFACE = module;
+        
+        #
+        # Surface laptop 1 keyboard
+        #
+        SERIAL_DEV_BUS = yes;
+        SERIAL_DEV_CTRL_TTYPORT = yes;
 
         #
         # Surface Hotplug