diff --git a/setup.py b/setup.py
index b463d6be..59845771 100644
--- a/setup.py
+++ b/setup.py
@@ -99,9 +99,8 @@ def run(self):
                         'catkin_tools-completion.bash')))
 
 parser = argparse.ArgumentParser(add_help=False)
-prefix_group = parser.add_mutually_exclusive_group()
-prefix_group.add_argument('--user', '--home', action='store_true')
-prefix_group.add_argument('--prefix', default=None)
+parser.add_argument('--user', '--home', action='store_true')
+parser.add_argument('--prefix', default=None)
 
 opts, _ = parser.parse_known_args(sys.argv)
 userbase = site.getuserbase() if opts.user else None