diff --git a/python/ray/serve/api.py b/python/ray/serve/api.py
index 4f7a09c6f..a1052110b 100644
--- a/python/ray/serve/api.py
+++ b/python/ray/serve/api.py
@@ -385,10 +385,6 @@ def start(
                 - "NoServer" or None: disable HTTP server.
             - num_cpus (int): The number of CPU cores to reserve for each
               internal Serve HTTP proxy actor.  Defaults to 0.
-            - root_url (str): The URL where the Deployment will be located at.
-              If no `root_url` is provided, Serve will check the environment
-              variable `RAY_SERVE_ROOT_URL` on the Ray cluster which is
-              serving the Deployment.
         dedicated_cpu (bool): Whether to reserve a CPU core for the internal
           Serve controller actor.  Defaults to False.
     """