diff --git a/src/superio/nuvoton/nct6776/acpi/superio.asl b/src/superio/nuvoton/nct6776/acpi/superio.asl
index 980eab9cf8..abd5562e39 100644
--- a/src/superio/nuvoton/nct6776/acpi/superio.asl
+++ b/src/superio/nuvoton/nct6776/acpi/superio.asl
@@ -152,6 +152,7 @@ Device(SUPERIO_DEV) {
 	#undef SUPERIO_KBC_PS2M
 	#undef SUPERIO_KBC_PS2LDN
 	#define SUPERIO_KBC_LDN 5
+	#define SUPERIO_KBC_PS2M
 	#include <superio/acpi/pnp_kbc.asl>
 #endif