diff --git a/src/apps/jackseis.py b/src/apps/jackseis.py
index 188b675b4..53046113d 100755
--- a/src/apps/jackseis.py
+++ b/src/apps/jackseis.py
@@ -131,7 +131,7 @@ def main(args=None):
         help='only include files whose paths match REGEX')
 
     parser.add_option(
-        '--station-xml',
+        '--stationxml',
         dest='station_xml_fns',
         action='append',
         default=[],