diff --git a/pkgs/applications/graphics/processing/default.nix b/pkgs/applications/graphics/processing/default.nix
index 516068b4ea5c..ce3d639d1a30 100644
--- a/pkgs/applications/graphics/processing/default.nix
+++ b/pkgs/applications/graphics/processing/default.nix
@@ -30,6 +30,7 @@ stdenv.mkDerivation rec {
   meta = with stdenv.lib; {
     description = "A language and IDE for electronic arts";
     homepage = http://processing.org;
+    license = licenses.gpl2Plus;
     maintainers = [ maintainers.goibhniu ];
     platforms = platforms.linux;
   };