diff --git a/redis/commands/core.py b/redis/commands/core.py
index 606256a33c..14428bbf96 100644
--- a/redis/commands/core.py
+++ b/redis/commands/core.py
@@ -3799,7 +3799,7 @@ def xrevrange(
     def xtrim(
         self,
         name: KeyT,
-        maxlen: int,
+        maxlen: Union[int, None],
         approximate: bool = True,
         minid: Union[StreamIdT, None] = None,
         limit: Union[int, None] = None,