diff --git a/lalinference/python/bayestar_samples_ppplot.py b/lalinference/python/bayestar_samples_ppplot.py
index 0d094c0768bd491f824fdcb24450cd00992c2cc3..46f98e0130eaa24b64d7e91abb4f4e6e691329ff 100644
--- a/lalinference/python/bayestar_samples_ppplot.py
+++ b/lalinference/python/bayestar_samples_ppplot.py
@@ -22,7 +22,6 @@ Create a P-P plot to compare a posterior sample chain with a sky map.
 # Command line interface.
 from argparse import FileType
 from lalinference.bayestar import command
-parser = command.ArgumentParser()
 parser = command.ArgumentParser(parents=[command.figure_parser])
 parser.add_argument(
     'skymap', metavar='SKYMAP.fits[.gz]', type=FileType('rb'),