diff --git a/Tools/px_mkfw.py b/Tools/px_mkfw.py
index 65e79234c2..ee83ca28d6 100755
--- a/Tools/px_mkfw.py
+++ b/Tools/px_mkfw.py
@@ -39,7 +39,6 @@
 # metadata fields and a zlib-compressed base64-encoded firmware image.
 #
 
-import sys
 import argparse
 import json
 import base64