Merge branches/pep-0384.
diff --git a/Modules/_elementtree.c b/Modules/_elementtree.c
index 851eed2..4fed46e 100644
--- a/Modules/_elementtree.c
+++ b/Modules/_elementtree.c
@@ -1272,7 +1272,7 @@
         if (!self->extra)
             return PyList_New(0);
 
-        if (PySlice_GetIndicesEx((PySliceObject *)item,
+        if (PySlice_GetIndicesEx(item,
                 self->extra->length,
                 &start, &stop, &step, &slicelen) < 0) {
             return NULL;
@@ -1331,7 +1331,7 @@
         if (!self->extra)
             element_new_extra(self, NULL);
 
-        if (PySlice_GetIndicesEx((PySliceObject *)item,
+        if (PySlice_GetIndicesEx(item,
                 self->extra->length,
                 &start, &stop, &step, &slicelen) < 0) {
             return -1;