SelectField choice cannot be False

[AstraLuma]

    joinlist = SelectField('Would you like to receive Teahouse news?', 
        choices=[
            (False, "No, essential emails only please"),
            (True, "Yes, send me occasional product updates"),
        ],
    )

Produces this HTML:

<select id="joinlist" name="joinlist">
    <option>No, essential emails only please</option>
    <option value="True">Yes, send me occasional product updates</option>
</select>

And if you select the "No" option (or leave it at the default), it'll say "Not a valid choice"

[AstraLuma]

My work-around is to use 0/1 instead.