diff --git a/pkgs/development/python-modules/peppercorn/default.nix b/pkgs/development/python-modules/peppercorn/default.nix
index e93f7e5ef44c..a47eb71111ef 100644
--- a/pkgs/development/python-modules/peppercorn/default.nix
+++ b/pkgs/development/python-modules/peppercorn/default.nix
@@ -19,5 +19,6 @@ buildPythonPackage rec {
     homepage = "https://docs.pylonsproject.org/projects/peppercorn/en/latest/";
     maintainers = [ ];
     platforms = lib.platforms.all;
+    license = lib.licenses.bsd3Modification;
   };
 }