diff --git a/home-manager/machines.nix b/home-manager/machines.nix
index fce2e08c..9f2af221 100644
--- a/home-manager/machines.nix
+++ b/home-manager/machines.nix
@@ -105,6 +105,7 @@ in
       ./roles/mail2rss.nix
       ./roles/headless-mpd.nix
       ./roles/headless.nix
+      ({ ... }: { programs.ssh.matchBlocks."*".certificateFile = "~/.ssh/id_auto_ed25519"; })
     ]);
   };
 }