diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 97cc87d654ce3258a931a8bfbd0bcd36a2d5622b..6e6b0da5928782f2083d64269fa934006e1fea36 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -751,6 +751,7 @@ static struct usb_device_id id_table_combined [] = {
 	{ USB_DEVICE(FTDI_VID, XVERVE_SIGNALYZER_SH4_PID),
 		.driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
 	{ USB_DEVICE(FTDI_VID, SEGWAY_RMP200_PID) },
+	{ USB_DEVICE(FTDI_VID, ACCESIO_COM4SM_PID) },
 	{ USB_DEVICE(IONICS_VID, IONICS_PLUGCOMPUTER_PID),
 		.driver_info = (kernel_ulong_t)&ftdi_jtag_quirk },
 	{ USB_DEVICE(FTDI_VID, FTDI_CHAMSYS_24_MASTER_WING_PID) },
diff --git a/drivers/usb/serial/ftdi_sio_ids.h b/drivers/usb/serial/ftdi_sio_ids.h
index 15a4583775ad236a359c3dec0c02c0aa7f5f7f4e..02659f5c79e20cad8f84fd1051be13083c54f503 100644
--- a/drivers/usb/serial/ftdi_sio_ids.h
+++ b/drivers/usb/serial/ftdi_sio_ids.h
@@ -1063,3 +1063,9 @@
  * Submitted by John G. Rogers
  */
 #define SEGWAY_RMP200_PID	0xe729
+
+
+/*
+ * Accesio USB Data Acquisition products (http://www.accesio.com/)
+ */
+#define ACCESIO_COM4SM_PID 	0xD578