diff --git a/lib/clacks/worker/send_webmention.ex b/lib/clacks/worker/send_webmention.ex
index 4065a97..4d77149 100644
--- a/lib/clacks/worker/send_webmention.ex
+++ b/lib/clacks/worker/send_webmention.ex
@@ -33,6 +33,8 @@ defmodule Clacks.Worker.SendWebmention do
     end
   end
 
+  def enqueue_for_activity(_), do: :ok
+
   @spec maybe_enqueue_for_candidate(Activity.t(), [String.t()], String.t()) :: boolean()
   defp maybe_enqueue_for_candidate(
          %Activity{data: %{"object" => %{"in_reply_to" => in_reply_to}}} = activity,