clarify filename for udev rule

diff --git a/README b/README
index 9c4346e04b4c96d96ddb4726f84ac5e279a2ae96..f69cadd93fd2a871bfb13a36081dbf52c2db03ec 100644 (file)
--- a/README
+++ b/README
@@ -51,7 +51,7 @@ Notes for the USB cable
 =======================
 
 To use the device as an ordinary user, put the following line in a new
-file in /etc/udev/rules.d/ and restart udev:
+file "libusb-driver.rules" in /etc/udev/rules.d/ and restart udev:
 ACTION=="add", BUS=="usb", SYSFS{idVendor}=="03fd", MODE="666"