diff --git a/stdlib/weakref.pyi b/stdlib/weakref.pyi
index 853caf3e8..4203756c7 100644
--- a/stdlib/weakref.pyi
+++ b/stdlib/weakref.pyi
@@ -172,11 +172,11 @@ class WeakKeyDictionary(MutableMapping[_KT, _VT]):
         @overload
         def __ior__(self, other: Iterable[tuple[_KT, _VT]]) -> Self: ...
 
-class finalize:  # TODO: This is a good candidate for to be a `Generic[_P, _T]` class
-    def __init__(self, obj: object, func: Callable[_P, Any], /, *args: _P.args, **kwargs: _P.kwargs) -> None: ...
+class finalize(Generic[_P, _T]):
+    def __init__(self, obj: _T, func: Callable[_P, Any], /, *args: _P.args, **kwargs: _P.kwargs) -> None: ...
     def __call__(self, _: Any = None) -> Any | None: ...
-    def detach(self) -> tuple[Any, Any, tuple[Any, ...], dict[str, Any]] | None: ...
-    def peek(self) -> tuple[Any, Any, tuple[Any, ...], dict[str, Any]] | None: ...
+    def detach(self) -> tuple[_T, Callable[_P, Any], tuple[Any, ...], dict[str, Any]] | None: ...
+    def peek(self) -> tuple[_T, Callable[_P, Any], tuple[Any, ...], dict[str, Any]] | None: ...
     @property
     def alive(self) -> bool: ...
     atexit: bool