diff -r 7efe1a5239e3 Objects/rangeobject.c
--- a/Objects/rangeobject.c	Fri Jun 17 11:13:03 2016 +0300
+++ b/Objects/rangeobject.c	Fri Jun 17 15:58:58 2016 +0300
@@ -30,12 +30,8 @@ validate_step(PyObject *step)
 
     step = PyNumber_Index(step);
     if (step) {
-        Py_ssize_t istep = PyNumber_AsSsize_t(step, NULL);
-        if (istep == -1 && PyErr_Occurred()) {
-            /* Ignore OverflowError, we know the value isn't 0. */
-            PyErr_Clear();
-        }
-        else if (istep == 0) {
+        assert(PyLong_Check(step));
+        if (_PyLong_Sign(step) == 0) {
             PyErr_SetString(PyExc_ValueError,
                             "range() arg 3 must not be zero");
             Py_CLEAR(step);