diff --git a/dgcm/main.py b/dgcm/main.py
index 06ceb76..e757eed 100644
--- a/dgcm/main.py
+++ b/dgcm/main.py
@@ -24,7 +24,7 @@ def main():
     mutually_exclusive_group.add_argument('-v', '--verbose', action='count', default=0, help='increase output verbosity')
     mutually_exclusive_group.add_argument('-q', '--quiet', action='store_true', help='disable output')
 
-    # parser.add_argument('connection', help='shortname of the connection to use')
+    parser.add_argument('connection', action='store_false', help='shortname of the connection to use')
 
     args = parser.parse_args()