diff --git a/pkgs/misc/emulators/retroarch/cores.nix b/pkgs/misc/emulators/retroarch/cores.nix
index 63e1db108e7..e055e5a15fa 100644
--- a/pkgs/misc/emulators/retroarch/cores.nix
+++ b/pkgs/misc/emulators/retroarch/cores.nix
@@ -507,7 +507,7 @@ in with stdenv.lib.licenses;
       sha256 = "1jhgfys8hiipvbwq3gc48d7v6wq645d10rbr4w5m6px0fk6csshk";
     };
     description = "Port of Game and Watch to libretro";
-    license = zlib;
+    license = stdenv.lib.licenses.zlib;
     makefile = "Makefile";
   };