From b0ab1a0e65a1af479041ebeaf15a133ce69133d4 Mon Sep 17 00:00:00 2001 From: Kovid Goyal Date: Tue, 19 Jan 2016 16:55:37 +0530 Subject: [PATCH] ... --- src/calibre/devices/usbms/device.py | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/calibre/devices/usbms/device.py b/src/calibre/devices/usbms/device.py index 6d86a3dc71..9a44289a4f 100644 --- a/src/calibre/devices/usbms/device.py +++ b/src/calibre/devices/usbms/device.py @@ -42,7 +42,7 @@ class USBDevice: if iswindows: # Getting this information requires communicating with the device # we only do that in the can_handle_windows() method, if needed. - self.manufacturer = self.serial = self.product = '' + self.manufacturer = self.serial = self.product = None else: self.manufacturer = dev[3] self.product = dev[4]