diff --git a/bundles/bind/files/db b/bundles/bind/files/db
index 6203c6f..2f8aae4 100644
--- a/bundles/bind/files/db
+++ b/bundles/bind/files/db
@@ -8,7 +8,7 @@ $TTL 600
 )
 
 % for record in sorted(records, key=lambda r: (r['name'], r['type'], r['value'])):
-  % for part in (record['value'][i:i+256] for i in range(0, len(record['value']), 255)):
+  % for part in (record['value'][i:i+255] for i in range(0, len(record['value']), 255)):
 ${record['name'].ljust(column_width('name', records))} \
 IN \
 ${record['type'].ljust(column_width('type', records))} \