diff --git a/nixos/modules/services/ttys/kmscon.nix b/nixos/modules/services/ttys/kmscon.nix
index 7783a1ada71..ba25f912844 100644
--- a/nixos/modules/services/ttys/kmscon.nix
+++ b/nixos/modules/services/ttys/kmscon.nix
@@ -32,6 +32,13 @@ in {
         default = "";
         example = "font-size=14";
       };
+
+      extraOptions = mkOption {
+        description = "Extra flags to pass to kmscon.";
+        type = types.separatedString " ";
+        default = "";
+        example = "--term xterm-256color";
+      };
     };
   };
 
@@ -53,7 +60,7 @@ in {
       ConditionPathExists=/dev/tty0
 
       [Service]
-      ExecStart=${pkgs.kmscon}/bin/kmscon "--vt=%I" --seats=seat0 --no-switchvt --configdir ${configDir} --login -- ${pkgs.shadow}/bin/login -p
+      ExecStart=${pkgs.kmscon}/bin/kmscon "--vt=%I" ${cfg.extraOptions} --seats=seat0 --no-switchvt --configdir ${configDir} --login -- ${pkgs.shadow}/bin/login -p
       UtmpIdentifier=%I
       TTYPath=/dev/%I
       TTYReset=yes