diff --git a/pkgs/by-name/lz/lzbench/package.nix b/pkgs/by-name/lz/lzbench/package.nix
index f688258a4403..b3724e23ed2f 100644
--- a/pkgs/by-name/lz/lzbench/package.nix
+++ b/pkgs/by-name/lz/lzbench/package.nix
@@ -25,7 +25,10 @@ stdenv.mkDerivation rec {
   meta = with lib; {
     inherit (src.meta) homepage;
     description = "In-memory benchmark of open-source LZ77/LZSS/LZMA compressors";
-    license = licenses.free;
+    license = with licenses; [
+      gpl2Only
+      gpl3Only
+    ];
     platforms = platforms.all;
     maintainers = with lib.maintainers; [ videl ];
     mainProgram = "lzbench";