diff --git a/libc/kernel/uapi/linux/input.h b/libc/kernel/uapi/linux/input.h
index fe17226..4858c81 100644
--- a/libc/kernel/uapi/linux/input.h
+++ b/libc/kernel/uapi/linux/input.h
@@ -125,6 +125,7 @@
 #define BUS_RMI 0x1D
 #define BUS_CEC 0x1E
 #define BUS_INTEL_ISHTP 0x1F
+#define BUS_AMD_SFH 0x20
 #define MT_TOOL_FINGER 0x00
 #define MT_TOOL_PEN 0x01
 #define MT_TOOL_PALM 0x02