diff --git a/src/calibre/devices/usbms/device.py b/src/calibre/devices/usbms/device.py
index 9018879f83..4bfb2c9e2a 100644
--- a/src/calibre/devices/usbms/device.py
+++ b/src/calibre/devices/usbms/device.py
@@ -870,7 +870,7 @@ class Device(DeviceConfig, DevicePlugin):
         if special_tag is None:
             from calibre.library.save_to_disk import get_components
             extra_components = get_components(template, mdata, fname)
-            extra_components[-1] = extra_components[-1] = sanitize(self.filename_callback(extra_components[-1]+ext, mdata)))
+            extra_components[-1] = extra_components[-1] = sanitize(self.filename_callback(extra_components[-1]+ext, mdata))
         else:
             tag = special_tag
             if tag.startswith(_('News')):