diff --git a/dap/worker.py b/dap/worker.py
index 4b158df..14e3e10 100644
--- a/dap/worker.py
+++ b/dap/worker.py
@@ -16,11 +16,11 @@ def main():
     parser.add_argument("--backend_host", required=True, default=None)
     parser.add_argument("--backend_port", required=True, default=None)
     parser.add_argument("--accumulator_host", default="localhost")
-    parser.add_argument("--accumulator_port", default=13002, type=int)
+    parser.add_argument("--accumulator_port", type=int, default=13002)
     parser.add_argument("--visualisation_host", default="localhost")
-    parser.add_argument("--visualisation_port", default=13002, type=int)
+    parser.add_argument("--visualisation_port", type=int, default=13002)
     parser.add_argument("--peakfinder_parameters", default=None, help="json file with peakfinder parameters")
-    parser.add_argument("--skip_frames_rate", default=1, type=int, help="send to streamvis each of skip_frames_rate frames")
+    parser.add_argument("--skip_frames_rate", type=int, default=1, help="skip (approximately) skip_frames_rate % of pulses")
 
     clargs = parser.parse_args()