diff --git a/src/calibre/gui2/device.py b/src/calibre/gui2/device.py
index ae38a8321b..48063b11a4 100644
--- a/src/calibre/gui2/device.py
+++ b/src/calibre/gui2/device.py
@@ -838,7 +838,8 @@ class DeviceMixin(object): # {{{
                             format_count[f] = 1
             for f in self.device_manager.device.settings().format_map:
                 if f in format_count.keys():
-                    formats.append((f, _('%i of %i Books') % (format_count[f], len(rows))), True if f in aval_out_formats else False)
+                    formats.append((f, _('%i of %i Books') % (format_count[f],
+                        len(rows)), True if f in aval_out_formats else False))
                 elif f in aval_out_formats:
                     formats.append((f, _('0 of %i Books') % len(rows)), True)
             d = ChooseFormatDeviceDialog(self, _('Choose format to send to device'), formats)