  We present linear polarization observations of the exoplanet system HD 189733
made with the HIgh Precision Polarimetric Instrument (HIPPI) on the
Anglo-Australian Telescope (AAT). The observations have higher precision than
any previously reported for this object. They do not show the large amplitude
polarization variations reported by Berdyugina et al. 2008 and Berdyugina et
al. 2011. Our results are consistent with polarization data presented by
Wiktorowicz et al. 2015. A formal least squares fit of a Rayleigh-Lambert model
yields a polarization amplitude of 29.4 +/- 15.6 parts-per-million. We observe
a background constant level of polarization of ~ 55-70 ppm, which is a little
higher than expected for interstellar polarization at the distance of HD
189733.
