diff --git a/telethon/hints.py b/telethon/hints.py
index ca581aec..bd69f053 100644
--- a/telethon/hints.py
+++ b/telethon/hints.py
@@ -32,7 +32,7 @@ MarkupLike = typing.Union[
 
 TotalList = helpers.TotalList
 
-DateLike = typing.Optional[float, datetime.datetime, datetime.date, datetime.timedelta]
+DateLike = typing.Optional[typing.Union[float, datetime.datetime, datetime.date, datetime.timedelta]]
 
 
 LocalPath = str