diff --git a/docs/content/CLI.md b/docs/content/CLI.md
index 32bb6f8..a92a51a 100644
--- a/docs/content/CLI.md
+++ b/docs/content/CLI.md
@@ -21,7 +21,9 @@ Now you're ready to use the CLI tool.
 * `vieter repos list` returns all repositories currently stored in the API.
 * `vieter repos add url branch repo arch...` adds the repository with the given
   URL, branch, repo & arch to the API.
+    * `arch` is a comma-separated list of architectures, examples are `x86_64`, but also `x86_64,aarch64`
 * `vieter repos remove id` removes the repository with the given ID prefix.
+    * `id` should be the ID of the repo returned by `vieter repos list`. 
 
 You can always check `vieter -help` or `vieter repos -help` for more
 information about the commands.