diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 10bc1bf..5839449 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -480,6 +480,7 @@
 	{ USB_DEVICE(KOBIL_VID, KOBIL_CONV_B1_PID) },
 	{ USB_DEVICE(KOBIL_VID, KOBIL_CONV_KAAN_PID) },
 	{ USB_DEVICE(POSIFLEX_VID, POSIFLEX_PP7000_PID) },
+	{ USB_DEVICE(FTDI_VID, FTDI_TTUSB_PID) },
 	{ },					/* Optional parameter entry */
 	{ }					/* Terminating entry */
 };
diff --git a/drivers/usb/serial/ftdi_sio.h b/drivers/usb/serial/ftdi_sio.h
index 00d45f8..255ea1f 100644
--- a/drivers/usb/serial/ftdi_sio.h
+++ b/drivers/usb/serial/ftdi_sio.h
@@ -31,9 +31,14 @@
 #define FTDI_NF_RIC_VID	0x0DCD	/* Vendor Id */
 #define FTDI_NF_RIC_PID	0x0001	/* Product Id */
 
+
 /* www.irtrans.de device */
 #define FTDI_IRTRANS_PID 0xFC60 /* Product Id */
 
+
+/* www.thoughttechnology.com/ TT-USB provide with procomp use ftdi_sio */
+#define FTDI_TTUSB_PID 0xFF20 /* Product Id */
+
 /* www.crystalfontz.com devices - thanx for providing free devices for evaluation ! */
 /* they use the ftdi chipset for the USB interface and the vendor id is the same */
 #define FTDI_XF_632_PID 0xFC08	/* 632: 16x2 Character Display */