diff --git a/cap-notebook/demoapp/app/admin-books/fiori-service.cds b/cap-notebook/demoapp/app/admin-books/fiori-service.cds
index 7b84a0f4..d8cd8382 100644
--- a/cap-notebook/demoapp/app/admin-books/fiori-service.cds
+++ b/cap-notebook/demoapp/app/admin-books/fiori-service.cds
@@ -126,4 +126,8 @@ annotate AdminService.Books with {
 // Show Genre as drop down, not a dialog
 annotate AdminService.Books with {
   genre @Common.ValueListWithFixedValues;
-}
\ No newline at end of file
+}
+
+annotate AdminService.Books.attachments with {
+  customProperty1 @Common.ValueListWithFixedValues;
+}