diff --git a/keyfork/src/cli/shard.rs b/keyfork/src/cli/shard.rs
index 1a36d5f..e1f4b8b 100644
--- a/keyfork/src/cli/shard.rs
+++ b/keyfork/src/cli/shard.rs
@@ -66,7 +66,7 @@ impl ShardExec for OpenPGP {
             "cert count {} != max {max}",
             certs.len()
         );
-        keyfork_shard::openpgp::split(threshold, certs, secret, output)
+        keyfork_shard::openpgp::split(threshold, certs, secret, output).map_err(Into::into)
     }
 
     fn combine<T>(