diff --git a/drivers/usb/serial/ftdi_sio.c b/drivers/usb/serial/ftdi_sio.c
index 216f187..f6d8566 100644
--- a/drivers/usb/serial/ftdi_sio.c
+++ b/drivers/usb/serial/ftdi_sio.c
@@ -697,6 +697,7 @@
 	{ USB_DEVICE(RATOC_VENDOR_ID, RATOC_PRODUCT_ID_USB60F) },
 	{ USB_DEVICE(FTDI_VID, FTDI_REU_TINY_PID) },
 	{ USB_DEVICE(PAPOUCH_VID, PAPOUCH_QUIDO4x4_PID) },
+	{ USB_DEVICE(PAPOUCH_VID, PAPOUCH_AD4USB_PID) },
 	{ USB_DEVICE(FTDI_VID, FTDI_DOMINTELL_DGQG_PID) },
 	{ USB_DEVICE(FTDI_VID, FTDI_DOMINTELL_DUSB_PID) },
 	{ USB_DEVICE(ALTI2_VID, ALTI2_N3_PID) },
diff --git a/drivers/usb/serial/ftdi_sio_ids.h b/drivers/usb/serial/ftdi_sio_ids.h
index da92b49..2478130 100644
--- a/drivers/usb/serial/ftdi_sio_ids.h
+++ b/drivers/usb/serial/ftdi_sio_ids.h
@@ -968,6 +968,7 @@
 #define PAPOUCH_VID			0x5050	/* Vendor ID */
 #define PAPOUCH_TMU_PID			0x0400	/* TMU USB Thermometer */
 #define PAPOUCH_QUIDO4x4_PID		0x0900	/* Quido 4/4 Module */
+#define PAPOUCH_AD4USB_PID		0x8003	/* AD4USB Measurement Module */
 
 /*
  * Marvell SheevaPlug