diff --git a/etiquette/objects.py b/etiquette/objects.py
index 00f700f..a2b7391 100644
--- a/etiquette/objects.py
+++ b/etiquette/objects.py
@@ -472,6 +472,8 @@ class Bookmark(ObjectBase):
             self.title = title
 
         if url is not None:
+            if not url:
+                raise ValueError('Need a URL')
             self.url = url
 
         cur = self.photodb.sql.cursor()