  Aims. We present new photometry of the faint and poorly studied cataclysmic
variable SDSS J152419.33+220920.0, analyze its light curve and provide an
accurate ephemeris for this system. Methods. Time-resolved CCD differential
photometry was carried out using the 1.5m and 0.84m telescopes at the
Observatorio Astronomico Nacional at San Pedro Martir. Results. From
time-resolved photometry of the system obtained during six nights (covering
more than twenty primary eclipse cycles in more than three years), we show that
this binary presents a strong primary and a weak secondary modulation. Our
light curve analysis shows that only two fundamental frequencies are present,
corresponding to the orbital period and a modulation with twice this frequency.
We determine the accurate ephemeris of the system to be HJD(eclipse)=
2454967.6750(1) + 0.06531866661(1) E. A double-hump orbital period modulation,
a standing feature in several bounce-back systems at quiescence, is present at
several epochs. However, we found no other evidence to support the hypothesis
that this system belongs to the post-minimum orbital-period systems.
