diff --git a/pkgs/tools/text/zimreader/default.nix b/pkgs/tools/text/zimreader/default.nix
index 4271bf095a14..fbd9bc3fa20a 100644
--- a/pkgs/tools/text/zimreader/default.nix
+++ b/pkgs/tools/text/zimreader/default.nix
@@ -31,6 +31,7 @@ stdenv.mkDerivation rec {
   meta = {
     description = "A tool to serve ZIM files using HTTP";
     homepage = http://git.wikimedia.org/log/openzim;
+    license = stdenv.lib.licenses.gpl2;
     maintainers = with stdenv.lib.maintainers; [ robbinch juliendehos ];
     platforms = [ "x86_64-linux" ];
   };