diff --git a/Python/marshal.c b/Python/marshal.c
index ce828da..5672a06 100644
--- a/Python/marshal.c
+++ b/Python/marshal.c
@@ -1095,7 +1095,7 @@
 	}
 	if (wf.str != NULL) {
 		/* XXX Quick hack -- need to do this differently */
-		res = PyBytes_FromObject(wf.str);
+		res = PyByteArray_FromObject(wf.str);
 		Py_DECREF(wf.str);
 	}
 	return res;
@@ -1136,9 +1136,9 @@
 		rf.ptr = PyString_AS_STRING(data);
 		rf.end = rf.ptr + PyString_GET_SIZE(data);
 	}
-	else if (PyBytes_Check(data)) {
-		rf.ptr = PyBytes_AS_STRING(data);
-		rf.end = rf.ptr + PyBytes_GET_SIZE(data);
+	else if (PyByteArray_Check(data)) {
+		rf.ptr = PyByteArray_AS_STRING(data);
+		rf.end = rf.ptr + PyByteArray_GET_SIZE(data);
 	}
 	else {
 		PyErr_Format(PyExc_TypeError,