diff --git a/keyfork-derive-openpgp/src/main.rs b/keyfork-derive-openpgp/src/main.rs
index ce2a891..ae0ec72 100644
--- a/keyfork-derive-openpgp/src/main.rs
+++ b/keyfork-derive-openpgp/src/main.rs
@@ -120,7 +120,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>> {
         serialize::Marshal,
     };
 
-    let mut w = Writer::new(std::io::stdout(), Kind::Message)?;
+    let mut w = Writer::new(std::io::stdout(), Kind::SecretKey)?;
 
     for packet in cert.into_packets() {
         packet.serialize(&mut w)?;