diff --git a/lib/philomena_web/controllers/api/json/oembed_controller.ex b/lib/philomena_web/controllers/api/json/oembed_controller.ex
index cfda244a..eb80eb8b 100644
--- a/lib/philomena_web/controllers/api/json/oembed_controller.ex
+++ b/lib/philomena_web/controllers/api/json/oembed_controller.ex
@@ -54,7 +54,7 @@ defmodule PhilomenaWeb.Api.Json.OembedController do
       version: "1.0",
       type: "photo",
       title: "##{image.id} - #{image.tag_list_cache} - Derpibooru",
-      author_url: image.source_url,
+      author_url: image.source_url || "",
       author_name: artist_tags(image.tags),
       provider_name: "Derpibooru",
       provider_url: PhilomenaWeb.Endpoint.url(),