diff --git a/yt_dlp/YoutubeDL.py b/yt_dlp/YoutubeDL.py
index ea6264a0d6..309489672e 100644
--- a/yt_dlp/YoutubeDL.py
+++ b/yt_dlp/YoutubeDL.py
@@ -490,7 +490,7 @@ class YoutubeDL:
                        The template is mapped on a dictionary with keys 'progress' and 'info'
     retry_sleep_functions: Dictionary of functions that takes the number of attempts
                        as argument and returns the time to sleep in seconds.
-                       Allowed keys are 'http', 'fragment', 'file_access'
+                       Allowed keys are 'http', 'fragment', 'file_access', 'extractor'
     download_ranges:   A callback function that gets called for every video with
                        the signature (info_dict, ydl) -> Iterable[Section].
                        Only the returned sections will be downloaded.