diff --git a/usb.c b/usb.c
index 8493f36..b15418f 100644
--- a/usb.c
+++ b/usb.c
@@ -25,7 +25,7 @@ struct device {
 const struct device devices[] = {
 	{ 0xb102, 1, 0x83, 0x04 }, // Steel
 	{ 0xb105, 1, 0x82, 0x03 }, // MP3e2
-	{ 0xb109, 4, 0x82, 0x03 }, // 4-MX
+	{ 0xb109, 0, 0x84, 0x01 }, // 4-MX
 	{ 0, 0, 0, 0 }
 };
 
@@ -177,4 +177,4 @@ usb_write(uint8_t *data, size_t datalen)
 	memcpy(buf, data, datalen);
 	libusb_fill_bulk_transfer(xfer, usb_dev, d->ep_out, buf, datalen, usb_write_done, NULL, 0);
 	libusb_submit_transfer(xfer);
-}
\ No newline at end of file
+}