diff --git a/lib/pleroma/plugs/mapped_signature_to_identity_plug.ex b/lib/pleroma/plugs/mapped_signature_to_identity_plug.ex
index 2a8ed4470..1e7da4f50 100644
--- a/lib/pleroma/plugs/mapped_signature_to_identity_plug.ex
+++ b/lib/pleroma/plugs/mapped_signature_to_identity_plug.ex
@@ -23,7 +23,7 @@ defp key_id_from_conn(conn) do
 
   defp user_from_key_id(conn) do
     with key_actor_id when is_binary(key_actor_id) <- key_id_from_conn(conn),
-         %User{} = user <- User.get_or_fetch_by_ap_id(key_actor_id) do
+         {:ok, %User{} = user} <- User.get_or_fetch_by_ap_id(key_actor_id) do
       user
     else
       _ ->