1 files changed, 2 insertions, 2 deletions
diff --git a/Modules/_collectionsmodule.c b/Modules/_collectionsmodule.c
index ac81680..08fceca 100644
--- a/Modules/_collectionsmodule.c
+++ b/Modules/_collectionsmodule.c
@@ -913,8 +913,8 @@ deque_index(dequeobject *deque, PyObject *args)
     size_t start_state = deque->state;
 
     if (!PyArg_ParseTuple(args, "O|O&O&:index", &v,
-                                _PyEval_SliceIndex, &start,
-                                _PyEval_SliceIndex, &stop))
+                                _PyEval_SliceIndexNotNone, &start,
+                                _PyEval_SliceIndexNotNone, &stop))
         return NULL;
     if (start < 0) {
         start += Py_SIZE(deque);