diff --git a/stdlib/fileinput.pyi b/stdlib/fileinput.pyi
index 37783254c70f..7e437eb70286 100644
--- a/stdlib/fileinput.pyi
+++ b/stdlib/fileinput.pyi
@@ -67,7 +67,7 @@ def input(
 
 def close() -> None: ...
 def nextfile() -> None: ...
-def filename() -> str: ...
+def filename() -> StrOrBytesPath | None: ...
 def lineno() -> int: ...
 def filelineno() -> int: ...
 def fileno() -> int: ...
@@ -126,7 +126,7 @@ class FileInput(Generic[AnyStr]):
 
     def nextfile(self) -> None: ...
     def readline(self) -> AnyStr: ...
-    def filename(self) -> str: ...
+    def filename(self) -> StrOrBytesPath | None: ...
     def lineno(self) -> int: ...
     def filelineno(self) -> int: ...
     def fileno(self) -> int: ...