Port number does not survive save/edit cycle

I specify the port number in the Edit Bookmark dialog for a ssh connection on Gigolo 0.5.1. Gigolo saves it and then uses it when mounting the remote files system.

But if I re-edit the same configuration, Gigolo puts the standard port number of 22 into the Port: entry box. (All other fields are correctly transferred to the Edit Bookmark dialog.)

BTW the Edit Bookmarks screen shows the correct port number.