diff --git a/src/calibre/gui2/add2.py b/src/calibre/gui2/add2.py
index 93fc76eb0d..127b713f7a 100644
--- a/src/calibre/gui2/add2.py
+++ b/src/calibre/gui2/add2.py
@@ -410,6 +410,10 @@ class Adder(QObject):
                 'Failed to add any books, click "Show details" for more information')
             d(self.pd, _('Errors while adding'), msg, det_msg='\n'.join(self.report), show=True)
 
+        if gprefs['manual_add_auto_convert'] and self.added_book_ids and self.parent() is not None:
+            self.parent().iactions['Convert Books'].auto_convert_auto_add(
+                self.added_book_ids)
+
         try:
             if callable(self.callback):
                 self.callback(self)