diff --git a/README.adoc b/README.adoc
index 4561566e..3789abc8 100644
--- a/README.adoc
+++ b/README.adoc
@@ -79,7 +79,7 @@ compression::
   `zlib` and `zlib@openssh.com` (delayed zlib)
 
 private key files::
-   `pkcs8` encoded (what openssh uses)
+   `pkcs5`, `pkcs8`, `openssh-key-v1`
 
 If you need something that is not included, it shouldn't be too hard to add (do contribute it!)