diff --git a/src/calibre/library/cli.py b/src/calibre/library/cli.py
index 65752eb183..b79813aee8 100644
--- a/src/calibre/library/cli.py
+++ b/src/calibre/library/cli.py
@@ -368,6 +368,7 @@ def command_remove(args, dbpath):
 
 def do_add_format(db, id, fmt, path):
     db.add_format_with_hooks(id, fmt.upper(), path, index_is_id=True)
+    send_message()
 
 def add_format_option_parser():
     return get_parser(_(