Index: Objects/bytesobject.c
===================================================================
--- Objects/bytesobject.c	(revision 76268)
+++ Objects/bytesobject.c	(working copy)
@@ -2821,7 +2821,7 @@
 static PyObject *
 bytes_getnewargs(PyBytesObject *v)
 {
-	return Py_BuildValue("(s#)", v->ob_sval, Py_SIZE(v));
+	return Py_BuildValue("(y#)", v->ob_sval, Py_SIZE(v));
 }