diff --git a/examples/common.py b/examples/common.py
index 3b31f582c6..840e715e16 100755
--- a/examples/common.py
+++ b/examples/common.py
@@ -101,6 +101,7 @@ def base_parser(parser):
     parser.add_argument(
         '--os-cacert',
         metavar='<ca-bundle-file>',
+        dest='cacert',
         default=env('OS_CACERT'),
         help='CA certificate bundle file (Env: OS_CACERT)',
     )