diff --git a/importlib_resources/_legacy.py b/importlib_resources/_legacy.py
index caa7078f..1d5d3f1f 100644
--- a/importlib_resources/_legacy.py
+++ b/importlib_resources/_legacy.py
@@ -9,7 +9,7 @@
 from . import _common
 
 Package = Union[types.ModuleType, str]
-Resource = Union[str, os.PathLike]
+Resource = str
 
 
 def deprecated(func):