diff --git a/lib/decentralised_book_index_web/live/book_live/show.ex b/lib/decentralised_book_index_web/live/book_live/show.ex
index 959de2b..70e2518 100644
--- a/lib/decentralised_book_index_web/live/book_live/show.ex
+++ b/lib/decentralised_book_index_web/live/book_live/show.ex
@@ -121,7 +121,7 @@ defmodule DecentralisedBookIndexWeb.BookLive.Show do
     authors_string =
       author_roles
       |> Enum.map(fn author_role ->
-        if author_role.role == "" do
+        if author_role.role in ["", nil] do
           {"#{author_role.author.name}", author_role.author.id}
         else
           {"#{author_role.author.name} (#{author_role.role})", author_role.author.id}