diff --git a/sys/dev/ichwd/ichwd.c b/sys/dev/ichwd/ichwd.c
index 8d2d7d5ed8f6..38f9d55ec6d5 100644
--- a/sys/dev/ichwd/ichwd.c
+++ b/sys/dev/ichwd/ichwd.c
@@ -93,6 +93,7 @@ static struct ichwd_device ichwd_devices[] = {
 	{ DEVICEID_ICH8,     "Intel ICH8 watchdog timer",	8 },
 	{ DEVICEID_ICH8DH,   "Intel ICH8DH watchdog timer",	8 },
 	{ DEVICEID_ICH8DO,   "Intel ICH8DO watchdog timer",	8 },
+	{ DEVICEID_ICH8M,    "Intel ICH8M watchdog timer",      8 },
 	{ DEVICEID_63XXESB,  "Intel 63XXESB watchdog timer",	8 },
 	{ DEVICEID_ICH9,     "Intel ICH9 watchdog timer",	9 },
 	{ DEVICEID_ICH9R,    "Intel ICH9R watchdog timer",	9 },
diff --git a/sys/dev/ichwd/ichwd.h b/sys/dev/ichwd/ichwd.h
index 1ae938e15551..414b9a80acce 100644
--- a/sys/dev/ichwd/ichwd.h
+++ b/sys/dev/ichwd/ichwd.h
@@ -85,6 +85,7 @@ struct ichwd_softc {
 #define DEVICEID_ICH8		0x2810
 #define DEVICEID_ICH8DH		0x2812
 #define DEVICEID_ICH8DO		0x2814
+#define DEVICEID_ICH8M		0x2815
 #define DEVICEID_ICH9		0x2918
 #define DEVICEID_ICH9R		0x2916
 #define DEVICEID_ICH9DH		0x2912