diff --git a/lib/pleroma/conversation/participation.ex b/lib/pleroma/conversation/participation.ex
index 4ed93e5bd..5d3344cc5 100644
--- a/lib/pleroma/conversation/participation.ex
+++ b/lib/pleroma/conversation/participation.ex
@@ -12,6 +12,8 @@ defmodule Pleroma.Conversation.Participation do
   import Ecto.Changeset
   import Ecto.Query
 
+  @type t :: %__MODULE__{}
+
   schema "conversation_participations" do
     belongs_to(:user, User, type: FlakeId.Ecto.CompatType)
     belongs_to(:conversation, Conversation)