diff --git a/src/calibre/gui2/device.py b/src/calibre/gui2/device.py
index 4d4f66eab1..f012028c8a 100644
--- a/src/calibre/gui2/device.py
+++ b/src/calibre/gui2/device.py
@@ -607,6 +607,8 @@ class DeviceMenu(QMenu): # {{{
 
 class DeviceMixin(object): # {{{
 
+    device_metadata_available = pyqtSignal()
+
     def __init__(self):
         self.device_error_dialog = error_dialog(self, _('Error'),
                 _('Error communicating with device'), ' ')
@@ -791,6 +793,7 @@ class DeviceMixin(object): # {{{
         self.sync_news()
         self.sync_catalogs()
         self.refresh_ondevice()
+        self.device_metadata_available.emit()
 
     def refresh_ondevice(self, reset_only = False):
         '''
@@ -892,7 +895,7 @@ class DeviceMixin(object): # {{{
                 sub_dest_parts.append('')
             to = sub_dest_parts[0]
             fmts = sub_dest_parts[1]
-            subject = ';'.join(sub_dest_parts[2:]) 
+            subject = ';'.join(sub_dest_parts[2:])
             fmts = [x.strip().lower() for x in fmts.split(',')]
             self.send_by_mail(to, fmts, delete, subject=subject)