python
diff --git a/Misc/NEWS.d/next/Library/2023-09-24-16-43-33.gh-issue-109782.gMC_7z.rst b/Misc/NEWS.d/next/Library/2023-09-24-16-43-33.gh-issue-109782.gMC_7z.rst
@@ -0,0 +1,2 @@
+Ensure the signature of :func:`os.path.isdir` is identical on all platforms.
+Patch by Amin Alaee.
diff --git a/Modules/clinic/posixmodule.c.h b/Modules/clinic/posixmodule.c.h
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
@@ -4901,25 +4901,25 @@ os__path_splitroot_impl(PyObject *module, path_t *path)
 /*[clinic input]
 os._path_isdir
 
-    path: 'O'
+    s: 'O'
 
 Return true if the pathname refers to an existing directory.
 
 [clinic start generated code]*/
 
 static PyObject *
-os__path_isdir_impl(PyObject *module, PyObject *path)
-/*[clinic end generated code: output=00faea0af309669d input=b1d2571cf7291aaf]*/
+os__path_isdir_impl(PyObject *module, PyObject *s)
+/*[clinic end generated code: output=9d87ab3c8b8a4e61 input=c17f7ef21d22d64e]*/
 {
     HANDLE hfile;
     BOOL close_file = TRUE;
     FILE_BASIC_INFO info;
-    path_t _path = PATH_T_INITIALIZE("isdir", "path", 0, 1);
+    path_t _path = PATH_T_INITIALIZE("isdir", "s", 0, 1);
     int result;
     BOOL slow_path = TRUE;
     FILE_STAT_BASIC_INFORMATION statInfo;
 
-    if (!path_converter(path, &_path)) {
+    if (!path_converter(s, &_path)) {
         path_cleanup(&_path);
         if (PyErr_ExceptionMatches(PyExc_ValueError)) {
             PyErr_Clear();
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,2 @@
		Ensure the signature of :func:`os.path.isdir` is identical on all platforms.
		Patch by Amin Alaee.