diff --git a/skip-argparse-on-python3.patch b/skip-argparse-on-python3.patch
index f07b41c..e61ed14 100644
--- a/skip-argparse-on-python3.patch
+++ b/skip-argparse-on-python3.patch
@@ -17,7 +17,7 @@
  requirements = read_requires()
  if sys.version_info < (3,):
 -    requirements.append('cheetah')
-+    requirements.append('cheetah', 'argparse')
++    requirements.extend(('cheetah', 'argparse'))
  
  setuptools.setup(
      name='cloud-init',