diff --git a/api/src/dooris_api/__init__.py b/api/src/dooris_api/__init__.py
index 6c39f39..e096e98 100644
--- a/api/src/dooris_api/__init__.py
+++ b/api/src/dooris_api/__init__.py
@@ -120,7 +120,7 @@ def main():
     argp.add_argument(
         "--main-lock",
         required=False,
-        default=os.environ.get("DOORIS_MAIN_DOOR", None),
+        default=os.environ.get("DOORIS_MAIN_LOCK", None),
         help="Name or ID of the door which will be considered the main door for spaceapi. If none is set, integration to spaceapi is disabled",
     )