1 files changed, 3 insertions, 3 deletions
diff --git a/Objects/stringobject.c b/Objects/stringobject.c
index 9b93898..ef4f8c1 100644
--- a/Objects/stringobject.c
+++ b/Objects/stringobject.c
@@ -1310,11 +1310,11 @@ string_subscript(PyStringObject* self, PyObject* item)
         char* result_buf;
         PyObject* result;
 
-        if (PySlice_GetIndicesEx((PySliceObject*)item,
-                         PyString_GET_SIZE(self),
-                         &start, &stop, &step, &slicelength) < 0) {
+        if (_PySlice_Unpack((PySliceObject *)item, &start, &stop, &step) < 0) {
             return NULL;
         }
+        slicelength = _PySlice_AdjustIndices(PyString_GET_SIZE(self), &start,
+                                            &stop, step);
 
         if (slicelength <= 0) {
             return PyString_FromStringAndSize("", 0);