diff --git a/ignite/handlers/checkpoint.py b/ignite/handlers/checkpoint.py
index 319fa8b1dc8c..901810516c51 100644
--- a/ignite/handlers/checkpoint.py
+++ b/ignite/handlers/checkpoint.py
@@ -3,6 +3,7 @@
 import os
 import stat
 import tempfile
+import warnings
 from abc import ABCMeta, abstractmethod
 from collections import OrderedDict
 from pathlib import Path