diff --git a/stdlib/3/fileinput.pyi b/stdlib/3/fileinput.pyi
index 1d8ee2baa..04d8da79b 100644
--- a/stdlib/3/fileinput.pyi
+++ b/stdlib/3/fileinput.pyi
@@ -1,4 +1,4 @@
-from typing import Iterable, BinaryIO, List
+from typing import Iterable, BinaryIO, List, Callable
 
 
 def input(