Rename _Py_identifier to _Py_IDENTIFIER.
diff --git a/Objects/bytearrayobject.c b/Objects/bytearrayobject.c
index 41ea2dd..0c9add0 100644
--- a/Objects/bytearrayobject.c
+++ b/Objects/bytearrayobject.c
@@ -2698,7 +2698,7 @@
 bytearray_reduce(PyByteArrayObject *self)
 {
     PyObject *latin1, *dict;
-    _Py_identifier(__dict__);
+    _Py_IDENTIFIER(__dict__);
 
     if (self->ob_bytes)
         latin1 = PyUnicode_DecodeLatin1(self->ob_bytes,