--- a/src/if_python3.c
+++ b/src/if_python3.c
@@ -97,6 +97,9 @@
 #define Py_ssize_t_fmt "n"
 #define Py_bytes_fmt "y"
 
+#define PyIntArgFunc	ssizeargfunc
+#define PyIntObjArgProc	ssizeobjargproc
+
 #if defined(DYNAMIC_PYTHON3) || defined(PROTO)
 
 # ifndef WIN3264
@@ -292,7 +295,8 @@ static PyObject* (*py3_PyTuple_GetItem)(
 static int (*py3_PyMapping_Check)(PyObject *);
 static PyObject* (*py3_PyMapping_Keys)(PyObject *);
 static int (*py3_PySlice_GetIndicesEx)(PyObject *r, Py_ssize_t length,
-		     Py_ssize_t *start, Py_ssize_t *stop, Py_ssize_t *step, Py_ssize_t *slicelength);
+		     Py_ssize_t *start, Py_ssize_t *stop, Py_ssize_t *step,
+		     Py_ssize_t *slicelen);
 static PyObject* (*py3_PyErr_NoMemory)(void);
 static void (*py3_Py_Finalize)(void);
 static void (*py3_PyErr_SetString)(PyObject *, const char *);
@@ -1478,76 +1482,6 @@ DictionarySetattro(PyObject *self, PyObj
 /* List object - Definitions
  */
 
-static PySequenceMethods ListAsSeq = {
-    (lenfunc)		ListLength,	 /* sq_length,	  len(x)   */
-    (binaryfunc)	0,		 /* RangeConcat, sq_concat,  x+y   */
-    (ssizeargfunc)	0,		 /* RangeRepeat, sq_repeat,  x*n   */
-    (ssizeargfunc)	ListItem,	 /* sq_item,	  x[i]	   */
-    (void *)		0,		 /* was_sq_slice,     x[i:j]   */
-    (ssizeobjargproc)	ListAssItem,	 /* sq_as_item,  x[i]=v   */
-    (void *)		0,		 /* was_sq_ass_slice, x[i:j]=v */
-    0,					 /* sq_contains */
-    (binaryfunc)	ListConcatInPlace,/* sq_inplace_concat */
-    0,					 /* sq_inplace_repeat */
-};
-
-static PyObject *ListSubscript(PyObject *, PyObject *);
-static Py_ssize_t ListAsSubscript(PyObject *, PyObject *, PyObject *);
-
-static PyMappingMethods ListAsMapping = {
-    /* mp_length	*/ (lenfunc) ListLength,
-    /* mp_subscript     */ (binaryfunc) ListSubscript,
-    /* mp_ass_subscript */ (objobjargproc) ListAsSubscript,
-};
-
-    static PyObject *
-ListSubscript(PyObject *self, PyObject* idx)
-{
-    if (PyLong_Check(idx))
-    {
-	long _idx = PyLong_AsLong(idx);
-	return ListItem((ListObject *)(self), _idx);
-    }
-    else if (PySlice_Check(idx))
-    {
-	Py_ssize_t start, stop, step, slicelen;
-
-	if (PySlice_GetIndicesEx(idx, ListLength((ListObject *)(self)),
-				 &start, &stop, &step, &slicelen) < 0)
-	    return NULL;
-	return ListSlice((ListObject *)(self), start, stop);
-    }
-    else
-    {
-	RAISE_INVALID_INDEX_TYPE(idx);
-	return NULL;
-    }
-}
-
-    static Py_ssize_t
-ListAsSubscript(PyObject *self, PyObject *idx, PyObject *obj)
-{
-    if (PyLong_Check(idx))
-    {
-	long _idx = PyLong_AsLong(idx);
-	return ListAssItem((ListObject *)(self), _idx, obj);
-    }
-    else if (PySlice_Check(idx))
-    {
-	Py_ssize_t start, stop, step, slicelen;
-
-	if (PySlice_GetIndicesEx(idx, ListLength((ListObject *)(self)),
-				 &start, &stop, &step, &slicelen) < 0)
-	    return -1;
-	return ListAssSlice((ListObject *)(self), start, stop, obj);
-    }
-    else
-    {
-	RAISE_INVALID_INDEX_TYPE(idx);
-	return -1;
-    }
-}
-
     static PyObject *
 ListGetattro(PyObject *self, PyObject *nameobj)
 {