diff --git a/Modules/clinic/posixmodule.c.h b/Modules/clinic/posixmodule.c.h
index 9de5b0391f7..2c0074a1a56 100644
--- a/Modules/clinic/posixmodule.c.h
+++ b/Modules/clinic/posixmodule.c.h
@@ -995,7 +995,8 @@ exit:
 PyDoc_STRVAR(os__isdir__doc__,
 "_isdir($module, path, /)\n"
 "--\n"
-"\n");
+"\n"
+"Return true if the pathname refers to an existing directory.");
 
 #define OS__ISDIR_METHODDEF    \
     {"_isdir", (PyCFunction)os__isdir, METH_O, os__isdir__doc__},
@@ -6351,4 +6352,4 @@ exit:
 #ifndef OS_GETRANDOM_METHODDEF
     #define OS_GETRANDOM_METHODDEF
 #endif /* !defined(OS_GETRANDOM_METHODDEF) */
-/*[clinic end generated code: output=e4a3bd36c7bb8356 input=a9049054013a1b77]*/
+/*[clinic end generated code: output=61abf6df195aa5f1 input=a9049054013a1b77]*/
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index adcadc2dc4f..c2d518c7a55 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -3717,20 +3717,18 @@ os__getfinalpathname_impl(PyObject *module, PyObject *path)
     return result;
 }
 
-PyDoc_STRVAR(posix__isdir__doc__,
-"Return true if the pathname refers to an existing directory.");
-
 /*[clinic input]
 os._isdir
 
     path: path_t
     /
 
+Return true if the pathname refers to an existing directory.
 [clinic start generated code]*/
 
 static PyObject *
 os__isdir_impl(PyObject *module, path_t *path)
-/*[clinic end generated code: output=75f56f32720836cb input=e794f12faab62a2a]*/
+/*[clinic end generated code: output=75f56f32720836cb input=5e0800149c0ad95f]*/
 {
     DWORD attributes;