diff --git a/pkgs/tools/networking/driftnet/default.nix b/pkgs/tools/networking/driftnet/default.nix
index 5b39ca46460..bf0a43ce515 100644
--- a/pkgs/tools/networking/driftnet/default.nix
+++ b/pkgs/tools/networking/driftnet/default.nix
@@ -26,5 +26,6 @@ stdenv.mkDerivation rec {
     homepage = https://github.com/deiv/driftnet;
     maintainers = with maintainers; [ offline ];
     platforms = platforms.linux;
+    license = licenses.gpl2;
   };
 }