diff --git a/sys/dev/superio/superio.c b/sys/dev/superio/superio.c
--- a/sys/dev/superio/superio.c
+++ b/sys/dev/superio/superio.c
@@ -269,6 +269,11 @@
 	{ .type = SUPERIO_DEV_NONE },
 };
 
+const struct sio_device itehwm_devices[] = {
+	{ .ldn = 4, .type = SUPERIO_DEV_HWM },
+	{ .type = SUPERIO_DEV_NONE },
+};
+
 const struct sio_device nvt_devices[] = {
 	{ .ldn = 8, .type = SUPERIO_DEV_WDT },
 	{ .type = SUPERIO_DEV_NONE },
@@ -293,6 +298,10 @@
 	const char		*descr;
 	const struct sio_device	*devices;
 } superio_table[] = {
+	{
+		.vendor = SUPERIO_VENDOR_ITE, .devid = 0x8613,
+		.devices = itehwm_devices,
+	},
 	{
 		.vendor = SUPERIO_VENDOR_ITE, .devid = 0x8712,
 		.devices = ite_devices,