diff --git a/assertpy2/assertpy.py b/assertpy2/assertpy.py
index 5f4a667..5945d0a 100644
--- a/assertpy2/assertpy.py
+++ b/assertpy2/assertpy.py
@@ -722,7 +722,7 @@ class NegatedBuilder:
     def __init__(self, builder: AssertionBuilder) -> None:
         self._builder = builder
 
-    def __getattr__(self, name: str) -> object:
+    def __getattr__(self, name: str) -> Callable[..., AssertionBuilder]:
         if name in _NON_NEGATABLE:
             raise TypeError(_NON_NEGATABLE[name])
         attr = getattr(self._builder, name)
diff --git a/tests/test_typing.py b/tests/test_typing.py
index 2a33b22..d8980e4 100644
--- a/tests/test_typing.py
+++ b/tests/test_typing.py
@@ -53,6 +53,7 @@
     assert_type(assert_that(bytearray(b"raw")), _BytesAssertion[bytearray])
     assert_type(assert_that(len), _CallableAssertion)
     assert_type(assert_that(object()), AssertionBuilder[object])
+    assert_type(assert_that(42).not_.is_equal_to(43), AssertionBuilder[Any])
 
     # The iterable-cluster methods stay on their protocol (return Self), so chaining keeps the type.
     assert_type(assert_that([1, 2]).satisfies_exactly(lambda x: x > 0, lambda x: x > 1), _IterableAssertion[int])