diff --git a/CHANGELOG.md b/CHANGELOG.md
index c4485b3db..2ee17d239 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -58,6 +58,8 @@ switched to a new configuration mechanism, however it was not officially removed
 - Allow sending chat messages to yourself.
 - Fix remote users with a whitespace name.
 - OStatus / static FE endpoints: fixed inaccessibility for anonymous users on non-federating instances, switched to handling per `:restrict_unauthenticated` setting.
+- Mastodon API: Current user is now included in conversation if it's the only participant
+- Mastodon API: Fixed last_status.account being not filled with account data
 
 ## Unreleased (Patch)
 
diff --git a/lib/pleroma/web/mastodon_api/views/conversation_view.ex b/lib/pleroma/web/mastodon_api/views/conversation_view.ex
index a91994915..82fcff062 100644
--- a/lib/pleroma/web/mastodon_api/views/conversation_view.ex
+++ b/lib/pleroma/web/mastodon_api/views/conversation_view.ex
@@ -33,8 +33,15 @@ defmodule Pleroma.Web.MastodonAPI.ConversationView do
       end
 
     activity = Activity.get_by_id_with_object(last_activity_id)
-    # Conversations return all users except the current user.
-    users = Enum.reject(participation.recipients, &(&1.id == user.id))
+
+    # Conversations return all users except the current user,
+    # except when the current user is the only participant
+    users =
+      if length(participation.recipients) > 1 do
+        Enum.reject(participation.recipients, &(&1.id == user.id))
+      else
+        participation.recipients
+      end
 
     %{
       id: participation.id |> to_string(),
@@ -43,7 +50,8 @@ defmodule Pleroma.Web.MastodonAPI.ConversationView do
       last_status:
         render(StatusView, "show.json",
           activity: activity,
-          direct_conversation_id: participation.id
+          direct_conversation_id: participation.id,
+          for: user
         )
     }
   end
diff --git a/test/pleroma/web/mastodon_api/controllers/conversation_controller_test.exs b/test/pleroma/web/mastodon_api/controllers/conversation_controller_test.exs
index b23b22752..c67e584dd 100644
--- a/test/pleroma/web/mastodon_api/controllers/conversation_controller_test.exs
+++ b/test/pleroma/web/mastodon_api/controllers/conversation_controller_test.exs
@@ -55,14 +55,35 @@ defmodule Pleroma.Web.MastodonAPI.ConversationControllerTest do
 
       account_ids = Enum.map(res_accounts, & &1["id"])
       assert length(res_accounts) == 2
+      assert user_one.id not in account_ids
       assert user_two.id in account_ids
       assert user_three.id in account_ids
       assert is_binary(res_id)
       assert unread == false
       assert res_last_status["id"] == direct.id
+      assert res_last_status["account"]["id"] == user_one.id
       assert Participation.unread_count(user_one) == 0
     end
 
+    test "includes the user if the user is the only participant", %{
+      user: user_one,
+      conn: conn
+    } do
+      {:ok, _direct} = create_direct_message(user_one, [])
+
+      res_conn = get(conn, "/api/v1/conversations")
+
+      assert response = json_response_and_validate_schema(res_conn, 200)
+
+      assert [
+               %{
+                 "accounts" => [account]
+               }
+             ] = response
+
+      assert user_one.id == account["id"]
+    end
+
     test "observes limit params", %{
       user: user_one,
       user_two: user_two,
diff --git a/test/pleroma/web/mastodon_api/views/conversation_view_test.exs b/test/pleroma/web/mastodon_api/views/conversation_view_test.exs
index 2e8203c9b..20c10ba3d 100644
--- a/test/pleroma/web/mastodon_api/views/conversation_view_test.exs
+++ b/test/pleroma/web/mastodon_api/views/conversation_view_test.exs
@@ -36,9 +36,11 @@ defmodule Pleroma.Web.MastodonAPI.ConversationViewTest do
 
     assert conversation.id == participation.id |> to_string()
     assert conversation.last_status.id == activity.id
+    assert conversation.last_status.account.id == user.id
 
     assert [account] = conversation.accounts
     assert account.id == other_user.id
+
     assert conversation.last_status.pleroma.direct_conversation_id == participation.id
   end
 end