diff --git a/pytorch_transformers/file_utils.py b/pytorch_transformers/file_utils.py
index 25cdf998..fd655cec 100644
--- a/pytorch_transformers/file_utils.py
+++ b/pytorch_transformers/file_utils.py
@@ -14,7 +14,6 @@ import tempfile
 import fnmatch
 from functools import wraps
 from hashlib import sha256
-import sys
 from io import open
 
 import boto3