diff --git a/Include/pyport.h b/Include/pyport.h
index 176e21e..aa9c1f7 100644
--- a/Include/pyport.h
+++ b/Include/pyport.h
@@ -63,16 +63,25 @@
 
 /* uintptr_t is the C9X name for an unsigned integral type such that a
  * legitimate void* can be cast to uintptr_t and then back to void* again
- * without loss of information.
+ * without loss of information.  Similarly for intptr_t, wrt a signed
+ * integral type.
  */
 #ifdef HAVE_UINTPTR_T
-typedef uintptr_t Py_uintptr_t;
+typedef uintptr_t	Py_uintptr_t;
+typedef intptr_t	Py_intptr_t;
+
 #elif SIZEOF_VOID_P <= SIZEOF_INT
-typedef unsigned int Py_uintptr_t;
+typedef unsigned int	Py_uintptr_t;
+typedef int		Py_intptr_t;
+
 #elif SIZEOF_VOID_P <= SIZEOF_LONG
-typedef unsigned long Py_uintptr_t;
+typedef unsigned long	Py_uintptr_t;
+typedef long		Py_intptr_t;
+
 #elif defined(HAVE_LONG_LONG) && (SIZEOF_VOID_P <= SIZEOF_LONG_LONG)
-typedef unsigned LONG_LONG Py_uintptr_t;
+typedef unsigned LONG_LONG	Py_uintptr_t;
+typedef LONG_LONG		Py_intptr_t;
+
 #else
 #   error "Python needs a typedef for Py_uintptr_t in pyport.h."
 #endif /* HAVE_UINTPTR_T */
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
diff --git a/PC/msvcrtmodule.c b/PC/msvcrtmodule.c
index 2714458..4584370 100755
--- a/PC/msvcrtmodule.c
+++ b/PC/msvcrtmodule.c
@@ -98,7 +98,7 @@
 msvcrt_get_osfhandle(PyObject *self, PyObject *args)
 {
 	int fd;
-	intptr_t handle;
+	Py_intptr_t handle;
 
 	if (!PyArg_ParseTuple(args,"i:get_osfhandle", &fd))
 		return NULL;
diff --git a/PC/pyconfig.h b/PC/pyconfig.h
index 1e279ed..f287605 100644
--- a/PC/pyconfig.h
+++ b/PC/pyconfig.h
@@ -294,10 +294,6 @@
 #if _MSC_VER >= 1200 /* This file only exists in VC 6.0 or higher */
 #include <basetsd.h>
 #endif
-#if defined(MS_WINDOWS) && !defined(MS_WIN64)
-typedef long intptr_t;
-typedef unsigned long uintptr_t;
-#endif
 
 #if defined(MS_WIN64)
 /* maintain "win32" sys.platform for backward compatibility of Python code,
diff --git a/Python/thread_nt.h b/Python/thread_nt.h
index f32304f..1d27627 100644
--- a/Python/thread_nt.h
+++ b/Python/thread_nt.h
@@ -152,7 +152,7 @@
  */
 int PyThread_start_new_thread(void (*func)(void *), void *arg)
 {
-	uintptr_t rv;
+	unsigned long rv;
 	int success = 0;
 
 	dprintf(("%ld: PyThread_start_new_thread called\n", PyThread_get_thread_ident()));
@@ -161,7 +161,7 @@
 
 	rv = _beginthread(func, 0, arg); /* use default stack size */
  
-	if (rv != -1) {
+	if (rv != (unsigned long)-1) {
 		success = 1;
 		dprintf(("%ld: PyThread_start_new_thread succeeded: %p\n", PyThread_get_thread_ident(), rv));
 	}