  We present analysis of XMM-Newton Optical Monitor observations in the
near-ultraviolet of HD 189733, covering twenty primary transits of its hot
Jupiter planet. The transit is clearly detected with both the UVW2 and UVM2
filters, and our fits to the data reveal transit depths in agreement with that
observed optically. The measured depths correspond to radii of
$1.059^{+0.046}_{-0.050}$ and $0.94^{+0.15}_{-0.17}$ times the
optically-measured radius (1.187 R$_{\rm J}$ at 4950 \r{A}) in the UVW2 and
UVM2 bandpasses, respectively. We also find no statistically significant
variation in the transit depth across the 8 year baseline of the observations.
We rule out extended broadband absorption towards or beyond the Roche lobe at
the wavelengths investigated, although observations with higher spectral
resolution are required to determine if absorption out to those distances from
the planet is present in individual near-UV lines.
