diff --git a/stdlib/@tests/stubtest_allowlists/py313.txt b/stdlib/@tests/stubtest_allowlists/py313.txt
index 268b03053..7d6b8870f 100644
--- a/stdlib/@tests/stubtest_allowlists/py313.txt
+++ b/stdlib/@tests/stubtest_allowlists/py313.txt
@@ -14,11 +14,6 @@ ctypes._endian.SIZEOF_TIME_T
 ctypes._endian.cdll
 ctypes._endian.pydll
 ctypes._endian.pythonapi
-ctypes.c_char_p.from_param
-ctypes.c_void_p.from_param
-ctypes.c_wchar_p.from_param
-ctypes.wintypes.PCHAR.from_param
-ctypes.wintypes.PWCHAR.from_param
 doctest.TestResults.__doc__
 doctest.TestResults.__new__
 filecmp.dircmp.__init__
diff --git a/stdlib/_ctypes.pyi b/stdlib/_ctypes.pyi
index 5be81fa53..c1fb86193 100644
--- a/stdlib/_ctypes.pyi
+++ b/stdlib/_ctypes.pyi
@@ -71,7 +71,7 @@ class _CData(metaclass=_CDataMeta):
     @classmethod
     def from_address(cls, address: int) -> Self: ...
     @classmethod
-    def from_param(cls, obj: Any) -> Self | _CArgObject: ...
+    def from_param(cls, value: Any, /) -> Self | _CArgObject: ...
     @classmethod
     def in_dll(cls, library: CDLL, name: str) -> Self: ...
     def __buffer__(self, flags: int, /) -> memoryview: ...