diff --git a/lcm-python/lcm/__init__.pyi b/lcm-python/lcm/__init__.pyi
index 24ffec80..3920cd01 100644
--- a/lcm-python/lcm/__init__.pyi
+++ b/lcm-python/lcm/__init__.pyi
@@ -2,7 +2,7 @@ from os import PathLike
 from typing import Callable
 
 class LCM:
-    def __init__(self, provider: str) -> None: ...
+    def __init__(self, provider: str | None = None) -> None: ...
     def fileno(self) -> int: ...
     def handle(self) -> None: ...
     def handle_timeout(self, timeout_millis: int) -> int: ...