diff --git a/lib/last_fm/config.ex b/lib/last_fm/config.ex
index 7bbc677b..5b2df3a9 100644
--- a/lib/last_fm/config.ex
+++ b/lib/last_fm/config.ex
@@ -1,5 +1,5 @@
 defmodule LastFm.Config do
-  @type t :: %{
+  @type t :: %__MODULE__{
           api: module(),
           api_key: String.t(),
           user: String.t(),
diff --git a/lib/music_brainz/config.ex b/lib/music_brainz/config.ex
index 2fee503f..d6b64bb4 100644
--- a/lib/music_brainz/config.ex
+++ b/lib/music_brainz/config.ex
@@ -1,5 +1,5 @@
 defmodule MusicBrainz.Config do
-  @type t :: %{
+  @type t :: %__MODULE__{
           api: module(),
           user_agent: String.t()
         }