diff --git a/sys/dev/usb/serial/u3g.c b/sys/dev/usb/serial/u3g.c
index 9b82ba95b062..646063aef26f 100644
--- a/sys/dev/usb/serial/u3g.c
+++ b/sys/dev/usb/serial/u3g.c
@@ -458,6 +458,7 @@ static const struct usb_device_id u3g_devs[] = {
 	U3G_DEV(SIERRA, MC5727, 0),
 	U3G_DEV(SIERRA, MC5727_2, 0),
 	U3G_DEV(SIERRA, MC5728, 0),
+	U3G_DEV(SIERRA, MC8700, 0),
 	U3G_DEV(SIERRA, MC8755, 0),
 	U3G_DEV(SIERRA, MC8755_2, 0),
 	U3G_DEV(SIERRA, MC8755_3, 0),
diff --git a/sys/dev/usb/usbdevs b/sys/dev/usb/usbdevs
index de7266b39f3c..91fe9f436a75 100644
--- a/sys/dev/usb/usbdevs
+++ b/sys/dev/usb/usbdevs
@@ -2920,6 +2920,7 @@ product SIERRA C888		0x6890	C888
 product SIERRA C22		0x6891	C22
 product SIERRA E6892		0x6892	E6892
 product SIERRA E6893		0x6893	E6893
+product SIERRA MC8700		0x68A3	MC8700
 product SIERRA AIRCARD875	0x6820	Aircard 875 HSDPA
 product SIERRA TRUINSTALL	0x0fff	Aircard Tru Installer