diff --git a/lib/pleroma/web/mastodon_api/controllers/account_controller.ex b/lib/pleroma/web/mastodon_api/controllers/account_controller.ex
index 47649d41d..97295a52f 100644
--- a/lib/pleroma/web/mastodon_api/controllers/account_controller.ex
+++ b/lib/pleroma/web/mastodon_api/controllers/account_controller.ex
@@ -139,9 +139,7 @@ def verify_credentials(%{assigns: %{user: user}} = conn, _) do
   end
 
   @doc "PATCH /api/v1/accounts/update_credentials"
-  def update_credentials(%{assigns: %{user: original_user}, body_params: params} = conn, _params) do
-    user = original_user
-
+  def update_credentials(%{assigns: %{user: user}, body_params: params} = conn, _params) do
     params =
       params
       |> Enum.filter(fn {_, value} -> not is_nil(value) end)
@@ -183,12 +181,31 @@ def update_credentials(%{assigns: %{user: original_user}, body_params: params} =
     changeset = User.update_changeset(user, user_params)
 
     with {:ok, user} <- User.update_and_set_cache(changeset) do
+      user
+      |> build_update_activity_params()
+      |> ActivityPub.update()
+
       render(conn, "show.json", user: user, for: user, with_pleroma_settings: true)
     else
       _e -> render_error(conn, :forbidden, "Invalid request")
     end
   end
 
+  # Hotfix, handling will be redone with the pipeline
+  defp build_update_activity_params(user) do
+    object =
+      Pleroma.Web.ActivityPub.UserView.render("user.json", user: user)
+      |> Map.delete("@context")
+
+    %{
+      local: true,
+      to: [user.follower_address],
+      cc: [],
+      object: object,
+      actor: user.ap_id
+    }
+  end
+
   defp add_if_present(map, params, params_field, map_field, value_function \\ &{:ok, &1}) do
     with true <- is_map(params),
          true <- Map.has_key?(params, params_field),
diff --git a/test/web/mastodon_api/controllers/account_controller/update_credentials_test.exs b/test/web/mastodon_api/controllers/account_controller/update_credentials_test.exs
index 696228203..7c420985d 100644
--- a/test/web/mastodon_api/controllers/account_controller/update_credentials_test.exs
+++ b/test/web/mastodon_api/controllers/account_controller/update_credentials_test.exs
@@ -8,6 +8,7 @@ defmodule Pleroma.Web.MastodonAPI.MastodonAPIController.UpdateCredentialsTest do
 
   use Pleroma.Web.ConnCase
 
+  import Mock
   import Pleroma.Factory
 
   setup do: clear_config([:instance, :max_account_fields])
@@ -52,24 +53,31 @@ test "sets user settings in a generic way", %{conn: conn} do
 
       user = Repo.get(User, user_data["id"])
 
-      res_conn =
-        conn
-        |> assign(:user, user)
-        |> patch("/api/v1/accounts/update_credentials", %{
-          "pleroma_settings_store" => %{
-            masto_fe: %{
-              theme: "blub"
+      clear_config([:instance, :federating], true)
+
+      with_mock Pleroma.Web.Federator,
+        publish: fn _activity -> :ok end do
+        res_conn =
+          conn
+          |> assign(:user, user)
+          |> patch("/api/v1/accounts/update_credentials", %{
+            "pleroma_settings_store" => %{
+              masto_fe: %{
+                theme: "blub"
+              }
             }
-          }
-        })
+          })
 
-      assert user_data = json_response_and_validate_schema(res_conn, 200)
+        assert user_data = json_response_and_validate_schema(res_conn, 200)
 
-      assert user_data["pleroma"]["settings_store"] ==
-               %{
-                 "pleroma_fe" => %{"theme" => "bla"},
-                 "masto_fe" => %{"theme" => "blub"}
-               }
+        assert user_data["pleroma"]["settings_store"] ==
+                 %{
+                   "pleroma_fe" => %{"theme" => "bla"},
+                   "masto_fe" => %{"theme" => "blub"}
+                 }
+
+        assert_called(Pleroma.Web.Federator.publish(:_))
+      end
     end
 
     test "updates the user's bio", %{conn: conn} do