diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 20a9846..8215120 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -495,6 +495,7 @@
 	{ USB_DEVICE(FTDI_VID, FTDI_WESTREX_MODEL_8900F_PID) },
 	{ USB_DEVICE(FTDI_VID, FTDI_PCDJ_DAC2_PID) },
 	{ USB_DEVICE(FTDI_VID, FTDI_RRCIRKITS_LOCOBUFFER_PID) },
+	{ USB_DEVICE(FTDI_VID, FTDI_ASK_RDR400_PID) },
 	{ USB_DEVICE(ICOM_ID1_VID, ICOM_ID1_PID) },
 	{ USB_DEVICE(PAPOUCH_VID, PAPOUCH_TMU_PID) },
 	{ },					/* Optional parameter entry */