Index: Modules/_ctypes/callproc.c
===================================================================
--- Modules/_ctypes/callproc.c	(revision 54869)
+++ Modules/_ctypes/callproc.c	(working copy)
@@ -1247,9 +1247,9 @@
 
 static PyObject *py_dl_close(PyObject *self, PyObject *args)
 {
-	int handle;
+	Py_ssize_t handle;
 
-	if (!PyArg_ParseTuple(args, "i:dlclose", &handle))
+	if (!PyArg_ParseTuple(args, "n:dlclose", &handle))
 		return NULL;
 	if (dlclose((void*)handle)) {
 		PyErr_SetString(PyExc_OSError,
@@ -1263,10 +1263,10 @@
 static PyObject *py_dl_sym(PyObject *self, PyObject *args)
 {
 	char *name;
-	int handle;
+	Py_ssize_t handle;
 	void *ptr;
 
-	if (!PyArg_ParseTuple(args, "is:dlsym", &handle, &name))
+	if (!PyArg_ParseTuple(args, "ns:dlsym", &handle, &name))
 		return NULL;
 	ptr = ctypes_dlsym((void*)handle, name);
 	if (!ptr) {
@@ -1286,12 +1286,12 @@
 static PyObject *
 call_function(PyObject *self, PyObject *args)
 {
-	int func;
+	Py_ssize_t func;
 	PyObject *arguments;
 	PyObject *result;
 
 	if (!PyArg_ParseTuple(args,
-			      "iO!",
+			      "nO!",
 			      &func,
 			      &PyTuple_Type, &arguments))
 		return NULL;
@@ -1317,12 +1317,12 @@
 static PyObject *
 call_cdeclfunction(PyObject *self, PyObject *args)
 {
-	int func;
+	Py_ssize_t func;
 	PyObject *arguments;
 	PyObject *result;
 
 	if (!PyArg_ParseTuple(args,
-			      "iO!",
+			      "nO!",
 			      &func,
 			      &PyTuple_Type, &arguments))
 		return NULL;