diff --git a/lib/membership/member/changes/set_default_membership_fee_type.ex b/lib/membership/member/changes/set_default_membership_fee_type.ex
index 55f28e6..8b75ed7 100644
--- a/lib/membership/member/changes/set_default_membership_fee_type.ex
+++ b/lib/membership/member/changes/set_default_membership_fee_type.ex
@@ -8,6 +8,7 @@ defmodule Mv.Membership.Member.Changes.SetDefaultMembershipFeeType do
   """
   use Ash.Resource.Change
 
+  @spec change(Ash.Changeset.t(), keyword(), Ash.Resource.Change.context()) :: Ash.Changeset.t()
   def change(changeset, _opts, _context) do
     # Only set default if membership_fee_type_id is not already set
     current_type_id = Ash.Changeset.get_attribute(changeset, :membership_fee_type_id)