diff --git a/lib/pleroma/web/activity_pub/mrf/reject_non_public.ex b/lib/pleroma/web/activity_pub/mrf/reject_non_public.ex
index c1d25f488..e3fcc4447 100644
--- a/lib/pleroma/web/activity_pub/mrf/reject_non_public.ex
+++ b/lib/pleroma/web/activity_pub/mrf/reject_non_public.ex
@@ -2,12 +2,13 @@ defmodule Pleroma.Web.ActivityPub.MRF.RejectNonPublic do
   alias Pleroma.User
   @behaviour Pleroma.Web.ActivityPub.MRF
 
+  @impl true
   def filter(object) do
     if object["type"] == "Create" do
       user = User.get_by_ap_id(object["actor"])
       public = "https://www.w3.org/ns/activitystreams#Public"
 
-      #Determine visibility
+      # Determine visibility
       visibility =
         cond do
           public in object["to"] -> "public"