diff --git a/lib/pleroma/upload.ex b/lib/pleroma/upload.ex
index 89cd3d920..e6c484548 100644
--- a/lib/pleroma/upload.ex
+++ b/lib/pleroma/upload.ex
@@ -51,6 +51,7 @@ defmodule Pleroma.Upload do
           | {:size_limit, nil | non_neg_integer()}
           | {:uploader, module()}
           | {:filters, [module()]}
+          | {:actor, String.t()}
 
   @type t :: %__MODULE__{
           id: String.t(),
diff --git a/lib/pleroma/web/api_spec/operations/pleroma_mascot_operation.ex b/lib/pleroma/web/api_spec/operations/pleroma_mascot_operation.ex
index 775e27219..49c50751b 100644
--- a/lib/pleroma/web/api_spec/operations/pleroma_mascot_operation.ex
+++ b/lib/pleroma/web/api_spec/operations/pleroma_mascot_operation.ex
@@ -39,7 +39,7 @@ defmodule Pleroma.Web.ApiSpec.PleromaMascotOperation do
           %Schema{
             type: :object,
             properties: %{
-              file: %Schema{type: :string, format: :binary}
+              "file" => %Schema{type: :string, format: :binary}
             }
           },
           required: true
diff --git a/lib/pleroma/web/pleroma_api/controllers/mascot_controller.ex b/lib/pleroma/web/pleroma_api/controllers/mascot_controller.ex
index 66e9d8481..9c0e4b3f1 100644
--- a/lib/pleroma/web/pleroma_api/controllers/mascot_controller.ex
+++ b/lib/pleroma/web/pleroma_api/controllers/mascot_controller.ex
@@ -22,7 +22,7 @@ defmodule Pleroma.Web.PleromaAPI.MascotController do
   end
 
   @doc "PUT /api/v1/pleroma/mascot"
-  def update(%{assigns: %{user: user}, body_params: %{file: file}} = conn, _) do
+  def update(%{assigns: %{user: user}, body_params: %{"file" => file}} = conn, _) do
     with {:content_type, "image" <> _} <- {:content_type, file.content_type},
          {:ok, object} <- ActivityPub.upload(file, actor: User.ap_id(user)) do
       attachment = render_attachment(object)