diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index b458aed..a20da85 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -337,6 +337,7 @@
 	{ USB_DEVICE(FTDI_VID, FTDI_MTXORB_6_PID) },
 	{ USB_DEVICE(FTDI_VID, FTDI_PERLE_ULTRAPORT_PID) },
 	{ USB_DEVICE(FTDI_VID, FTDI_PIEGROUP_PID) },
+	{ USB_DEVICE(FTDI_VID, FTDI_TNC_X_PID) },
 	{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2101_PID) },
 	{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2102_PID) },
 	{ USB_DEVICE(SEALEVEL_VID, SEALEVEL_2103_PID) },