diff --git a/python/ray/_private/workers/default_worker.py b/python/ray/_private/workers/default_worker.py
index affdf70f6b85..be7c82eb4214 100644
--- a/python/ray/_private/workers/default_worker.py
+++ b/python/ray/_private/workers/default_worker.py
@@ -84,12 +84,6 @@
     action="store_true",
     help="True if code is loaded from local files, as opposed to the GCS.",
 )
-parser.add_argument(
-    "--use-pickle",
-    default=False,
-    action="store_true",
-    help="True if cloudpickle should be used for serialization.",
-)
 parser.add_argument(
     "--worker-type",
     required=False,