[Dovecot] Expire with space in mailbox name

Hello all,

I'm running Dovecot 1.1.3 and trying to make use of the expire plugin on my mbox-based mailboxes. Expire seems to be populating the database when it comes to the trash folder, but I'm having issues with a spam folder (unfortunately) named "Junk E-mail". I've tried quotes and a backslash to account for the space, but it's not happening. Can anyone tell me how I would account for a folder like this? Neither of the following work, and I haven't found an example that addresses this.

expire = Trash 7 "Junk E-mail" 7 expire = Trash 7 Junk\ E-mail 7

Thanks in advance.