1 files changed, 1 insertions, 1 deletions

diff --git a/design-notes.md b/design-notes.md
index bd8ca60..eabd50e 100644
--- a/design-notes.md
+++ b/design-notes.md
@@ -132,7 +132,7 @@ Serialised item structure:
   ],
 
   "path": "[resource path]",
-  "thumbnail": { "path": "[resource path]" },
+  "thumbnail": "[resource path | null]"},
 
 
   "_comment": "type-dependent",