diff --git a/pkgs/by-name/re/replace/package.nix b/pkgs/by-name/re/replace/package.nix
index 0030d562f921..1d8550f4870f 100644
--- a/pkgs/by-name/re/replace/package.nix
+++ b/pkgs/by-name/re/replace/package.nix
@@ -38,5 +38,6 @@ stdenv.mkDerivation (finalAttrs: {
     homepage = "https://replace.richardlloyd.org.uk/";
     mainProgram = "replace-literal";
     platforms = lib.platforms.unix;
+    license = lib.licenses.unfree;
   };
 })