Escape 'At sign' (@) in Oracle SQLPlus script filename

When trying to execute a script in SQLPlus that has an "At Sign" (@) in the filename, the @ symbol is expanded to the SID:

SQL> @ foo@bar.sql SP2-0310: unable to open file "fooorclbar.sql"

SQL> START foo@bar.sql SP2-0310: unable to open file "fooorclbar.sql"

Is there a way to escape the @ symbol in SQLPlus?