diff --git a/nixos/modules/services/networking/ssh/sshd.nix b/nixos/modules/services/networking/ssh/sshd.nix
index 9a6ac024bd4..77673b5287b 100644
--- a/nixos/modules/services/networking/ssh/sshd.nix
+++ b/nixos/modules/services/networking/ssh/sshd.nix
@@ -413,6 +413,9 @@ in
         unixAuth = cfg.passwordAuthentication;
       };
 
+    # These values are merged with the ones defined externally, see:
+    # https://github.com/NixOS/nixpkgs/pull/10155
+    # https://github.com/NixOS/nixpkgs/pull/41745
     services.openssh.authorizedKeysFiles =
       [ ".ssh/authorized_keys" ".ssh/authorized_keys2" "/etc/ssh/authorized_keys.d/%u" ];