diff --git a/pkgs/applications/science/misc/root/5.nix b/pkgs/applications/science/misc/root/5.nix
index 58cc8f8f59e..cab26577bd0 100644
--- a/pkgs/applications/science/misc/root/5.nix
+++ b/pkgs/applications/science/misc/root/5.nix
@@ -86,5 +86,6 @@ stdenv.mkDerivation rec {
     description = "A data analysis framework";
     platforms = platforms.unix;
     maintainers = with maintainers; [ veprbl ];
+    license = licenses.lgpl21;
   };
 }