diff --git a/dkim/__init__.py b/dkim/__init__.py
index 1938016..c711530 100644
--- a/dkim/__init__.py
+++ b/dkim/__init__.py
@@ -37,7 +37,6 @@ import hashlib
 import logging
 import re
 import time
-import sys
 
 # only needed for arc
 try: