diff --git a/setup.py b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 
 # Copyright (C) 2010-2020 RhodeCode GmbH
 #
@@ -19,7 +18,7 @@
 # and proprietary license terms, please see https://rhodecode.com/licenses/
 
 # Import early to make sure things are patched up properly
-from setuptools import setup, find_packages
+from setuptools import setup, find_packages, Extension
 
 import os
 import re