diff --git a/programs/fish.nix b/programs/fish.nix
index ead5f94..e01b758 100644
--- a/programs/fish.nix
+++ b/programs/fish.nix
@@ -11,7 +11,9 @@
     enable = true;
 
     interactiveShellInit = with pkgs; ''
-      ssh-add -l | grep -q (ssh-keygen -lf ~/.ssh/id_ed25519) || ssh-add ~/.ssh/id_ed25519
+      if test -f ~/.ssh/id_ed25519
+        ssh-add -l | grep -q (ssh-keygen -lf ~/.ssh/id_ed25519) || ssh-add ~/.ssh/id_ed25519
+      end
 
       ${lib.getExe starship} init fish | source
       ${lib.getExe nix-your-shell} fish | source