diff --git a/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex b/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex
index 543fdf416..90225460b 100644
--- a/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex
+++ b/lib/pleroma/web/mastodon_api/mastodon_api_controller.ex
@@ -464,7 +464,8 @@ def upload(%{assigns: %{user: _}} = conn, %{"file" => file} = data) do
   end
 
   def favourited_by(conn, %{"id" => id}) do
-    with %Activity{data: %{"object" => %{"likes" => likes}}} <- Repo.get(Activity, id) do
+    with %Activity{data: %{"object" => object}} <- Repo.get(Activity, id),
+         %Object{data: %{"likes" => likes}} <- Object.normalize(object) do
       q = from(u in User, where: u.ap_id in ^likes)
       users = Repo.all(q)
       render(conn, AccountView, "accounts.json", %{users: users, as: :user})
@@ -474,7 +475,8 @@ def favourited_by(conn, %{"id" => id}) do
   end
 
   def reblogged_by(conn, %{"id" => id}) do
-    with %Activity{data: %{"object" => %{"announcements" => announces}}} <- Repo.get(Activity, id) do
+    with %Activity{data: %{"object" => object}} <- Repo.get(Activity, id),
+         %Object{data: %{"announcements" => announces}} <- Object.normalize(object) do
       q = from(u in User, where: u.ap_id in ^announces)
       users = Repo.all(q)
       render(conn, AccountView, "accounts.json", %{users: users, as: :user})