diff --git a/webservice/manual_launch.py b/webservice/manual_launch.py
index a56e7b4fe5ed9f11b78579ffa39e59a334c93172..dd038780044426decbc6e2081bb6a8d2c96f44dd 100644
--- a/webservice/manual_launch.py
+++ b/webservice/manual_launch.py
@@ -8,7 +8,7 @@ import zmq
 parser = argparse.ArgumentParser(
     description='Request dark characterization. Will wait on data transfers to complete first!')
 parser.add_argument('--proposal', type=str, help='The proposal number, without leading p, but with leading zeros')
-parser.add_argument('--instrument', type=str, choices=["SPB", "MID", "FXE", "SCS", "SQS", "HED"], help='The instrument')
+parser.add_argument('--instrument', type=str, choices=["SPB", "MID", "FXE", "SCS", "SQS", "HED", "DETLAB"], help='The instrument')
 parser.add_argument('--cycle', type=str, help='The facility cycle')
 parser.add_argument('--run', type=int, help='Run number as an integer')
 parser.add_argument('--mdc-id', type=int, help='Run id from MDC')