SF bug [#456252] Python should never stomp on [u]intptr_t.
pyport.h:  typedef a new Py_intptr_t type.
    DELICATE ASSUMPTION:  That HAVE_UINTPTR_T implies intptr_t is
    available as well as uintptr_t.  If that turns out not to be
    true, things must get uglier (C99 wants both, so I think it's
    an assumption we're *likely* to get away with).
thread_nt.h, PyThread_start_new_thread:  MS _beginthread is documented
    as returning unsigned long; no idea why uintptr_t was being used.
Others:  Always use Py_[u]intptr_t, never [u]intptr_t directly.
diff --git a/Modules/posixmodule.c b/Modules/posixmodule.c
index c1ec84a..5f6f21d 100644
--- a/Modules/posixmodule.c
+++ b/Modules/posixmodule.c
@@ -1551,7 +1551,7 @@
 	PyObject *argv;
 	char **argvlist;
 	int mode, i, argc;
-	intptr_t spawnval;
+	Py_intptr_t spawnval;
 	PyObject *(*getitem)(PyObject *, int);
 
 	/* spawnv has three arguments: (mode, path, argv), where
@@ -1620,7 +1620,7 @@
 	char **envlist;
 	PyObject *key, *val, *keys=NULL, *vals=NULL, *res=NULL;
 	int mode, i, pos, argc, envc;
-	intptr_t spawnval;
+	Py_intptr_t spawnval;
 	PyObject *(*getitem)(PyObject *, int);
 
 	/* spawnve has four arguments: (mode, path, argv, env), where
@@ -3689,8 +3689,8 @@
 	Py_END_ALLOW_THREADS
 	if (!ok)
 		return win32_error("CreatePipe", NULL);
-	read_fd = _open_osfhandle((intptr_t)read, 0);
-	write_fd = _open_osfhandle((intptr_t)write, 1);
+	read_fd = _open_osfhandle((Py_intptr_t)read, 0);
+	write_fd = _open_osfhandle((Py_intptr_t)write, 1);
 	return Py_BuildValue("(ii)", read_fd, write_fd);
 #endif /* MS_WIN32 */
 #endif
diff --git a/Modules/socketmodule.c b/Modules/socketmodule.c
index 46ca35f..4ddaf9c 100644
--- a/Modules/socketmodule.c
+++ b/Modules/socketmodule.c
@@ -1423,7 +1423,7 @@
 	char *mode = "r";
 	int bufsize = -1;
 #ifdef MS_WIN32
-	intptr_t fd;
+	Py_intptr_t fd;
 #else
 	int fd;
 #endif