diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 45721731d37..790015af2e6 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -1075,7 +1075,7 @@ let
         A 2D game physics library for Python under
         the very liberal zlib license
       '';
-      license = license.zlib;
+      license = licenses.zlib;
       platforms = platforms.all;
       maintainers = [ maintainers.sepi ];
     };