diff --git a/pkgs/tools/misc/diskscan/default.nix b/pkgs/tools/misc/diskscan/default.nix
index 9449b7759a8..7b97e58fdf9 100644
--- a/pkgs/tools/misc/diskscan/default.nix
+++ b/pkgs/tools/misc/diskscan/default.nix
@@ -21,5 +21,6 @@ stdenv.mkDerivation rec {
     platforms = with platforms; linux;
     maintainers = with maintainers; [ peterhoeg ];
     inherit version;
+    license = licenses.gpl3;
   };
 }