diff --git a/pkgs/by-name/or/orthorobot/package.nix b/pkgs/by-name/or/orthorobot/package.nix
index f0ebe6b1463c..b2cb33ddff43 100644
--- a/pkgs/by-name/or/orthorobot/package.nix
+++ b/pkgs/by-name/or/orthorobot/package.nix
@@ -82,7 +82,7 @@ stdenv.mkDerivation (finalAttrs: {
     mainProgram = "orthorobot";
     maintainers = with lib.maintainers; [ leenaars ];
     platforms = lib.platforms.linux;
-    license = lib.licenses.free;
+    license = lib.licenses.wtfpl;
     downloadPage = "https://stabyourself.net/orthorobot/";
   };
 })