diff --git a/lib/spack/spack/config.py b/lib/spack/spack/config.py
index 9da5d7aaf0461f66921f52f4ec132ea7c90baf99..21e08ff66632f69705e8c6274e950ddc0b6f70c3 100644
--- a/lib/spack/spack/config.py
+++ b/lib/spack/spack/config.py
@@ -1,3 +1,4 @@
+# flake8: noqa
 ##############################################################################
 # Copyright (c) 2013-2015, Lawrence Livermore National Security, LLC.
 # Produced at the Lawrence Livermore National Laboratory.