diff --git a/bundles/apt/README.md b/bundles/apt/README.md
index 012d490..88d9c21 100644
--- a/bundles/apt/README.md
+++ b/bundles/apt/README.md
@@ -13,6 +13,9 @@
                     'deb',
                     'deb-src',
                 },
+                'options': { # optional
+                    'aarch': 'amd64',
+                },
                 'urls': {
                     'https://deb.debian.org/debian',
                 },