ICRS coordinate gives RA -0 when input is 0

This becomes a problem when I convert RA to string and I get "-0", which is not recognized as a valid RA by Cone Search Services.

    Python 3.3.2 (default, Oct 25 2013, 11:53:32) 
    [GCC 4.4.7 20120313 (Red Hat 4.4.7-3)] on linux
    >>> import astropy
    >>> astropy.__version__
    '0.4.dev7302'
    >>> from astropy.coordinates import ICRS
    >>> from astropy import units as u
    >>> ICRS(0, 0, unit=(u.degree, u.degree))
    <ICRS RA=-0.00000 deg, Dec=0.00000 deg>