diff --git a/sysaudit/__init__.pyi b/sysaudit/__init__.pyi
index cd66550..a423560 100644
--- a/sysaudit/__init__.pyi
+++ b/sysaudit/__init__.pyi
@@ -4,3 +4,15 @@ def audit(event: str, *args: typing.Any) -> None: ...
 def addaudithook(
     hook: typing.Callable[[str, typing.Tuple[typing.Any, ...]], None]
 ) -> None: ...
+
+_audit_fn = typing.Callable[[str, typing.Any], None]
+_addaudithook_fn = typing.Callable[
+    [typing.Callable[[str, typing.Tuple[typing.Any, ...]], None]], None
+]
+
+std_audit = typing.Optional[_audit_fn]
+std_addaudithook = typing.Optional[_addaudithook_fn]
+csysaudit_audit = typing.Optional[_audit_fn]
+csysaudit_addaudithook = typing.Optional[_addaudithook_fn]
+py_audit = typing.Optional[_audit_fn]
+py_addaudithook = typing.Optional[_addaudithook_fn]
diff --git a/tests/test_import.py b/tests/test_import.py
index 4fefc54..c602172 100644
--- a/tests/test_import.py
+++ b/tests/test_import.py
@@ -8,8 +8,8 @@ def test_module():  # type: () -> None
     assert sysaudit.addaudithook is not None
 
     if sys.version_info >= (3, 8, 0):
-        assert sysaudit.std_audit == sys.audit
-        assert sysaudit.std_addaudithook == sys.addaudithook
+        assert sysaudit.std_audit == sys.audit  # type: ignore
+        assert sysaudit.std_addaudithook == sys.addaudithook  # type: ignore
         assert sysaudit.audit == sys.audit  # type: ignore [attr-defined]
         assert sysaudit.addaudithook == sys.addaudithook  # type: ignore [attr-defined]
     else: