diff --git a/pkgs/development/python-modules/pbkdf2/default.nix b/pkgs/development/python-modules/pbkdf2/default.nix
index d663be3337cd..f08ecedebfaf 100644
--- a/pkgs/development/python-modules/pbkdf2/default.nix
+++ b/pkgs/development/python-modules/pbkdf2/default.nix
@@ -19,5 +19,6 @@ buildPythonPackage rec {
 
   meta = {
     maintainers = [ ];
+    license = lib.licenses.mit;
   };
 }