diff --git a/pkgs/games/construo/default.nix b/pkgs/games/construo/default.nix
index 7db64136731..38a67289d39 100644
--- a/pkgs/games/construo/default.nix
+++ b/pkgs/games/construo/default.nix
@@ -21,5 +21,6 @@ stdenv.mkDerivation rec {
   meta = {
     description = "Masses and springs simulation game";
     homepage = http://fs.fsf.org/construo/;
+    license = stdenv.lib.licenses.gpl3;
   };
 }