From ac2ef667aff282e8273c92ec339a011d41c51aa2 Mon Sep 17 00:00:00 2001
From: Joachim <joachim.robert@protonmail.com>
Date: Sun, 1 Jan 2023 19:57:10 +0100
Subject: [PATCH] Fix error when no referer

---
 bookwyrm/utils/validate.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bookwyrm/utils/validate.py b/bookwyrm/utils/validate.py
index 0c0f01f06..a6272319b 100644
--- a/bookwyrm/utils/validate.py
+++ b/bookwyrm/utils/validate.py
@@ -4,7 +4,7 @@ from bookwyrm.settings import DOMAIN, USE_HTTPS
 
 def validate_url_domain(url, default="/"):
     """Basic check that the URL starts with the instance domain name"""
-    if url in ("/", default):
+    if url in ("/", default, None):
         return url
 
     protocol = "https://" if USE_HTTPS else "http://"