diff --git a/Lib/test/test_cppext/setup.py b/Lib/test/test_cppext/setup.py
index b30c9e2746c980..ea1ed64bf7ab0a 100644
--- a/Lib/test/test_cppext/setup.py
+++ b/Lib/test/test_cppext/setup.py
@@ -3,6 +3,7 @@
 import os
 import platform
 import shlex
+import sys
 import sysconfig
 from test import support