diff --git a/pkgs/development/python-modules/chai/default.nix b/pkgs/development/python-modules/chai/default.nix
index a45bff2e2654..907de8a8cdc9 100644
--- a/pkgs/development/python-modules/chai/default.nix
+++ b/pkgs/development/python-modules/chai/default.nix
@@ -24,5 +24,6 @@ buildPythonPackage rec {
 
   meta = {
     description = "Mocking, stubbing and spying framework for python";
+    license = lib.licenses.bsd3;
   };
 }