diff --git a/stdlib/importlib/util.pyi b/stdlib/importlib/util.pyi
index 7dea5a718..0fb786e93 100644
--- a/stdlib/importlib/util.pyi
+++ b/stdlib/importlib/util.pyi
@@ -7,7 +7,7 @@ from typing import Any, Callable, List, Optional
 def module_for_loader(fxn: Callable[..., types.ModuleType]) -> Callable[..., types.ModuleType]: ...
 def set_loader(fxn: Callable[..., types.ModuleType]) -> Callable[..., types.ModuleType]: ...
 def set_package(fxn: Callable[..., types.ModuleType]) -> Callable[..., types.ModuleType]: ...
-def resolve_name(name: str, package: str) -> str: ...
+def resolve_name(name: str, package: str | None) -> str: ...
 
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