diff --git a/app/views/api/books/_book.json.jbuilder b/app/views/api/books/_book.json.jbuilder
index 08bca7944cf..0c78f713145 100644
--- a/app/views/api/books/_book.json.jbuilder
+++ b/app/views/api/books/_book.json.jbuilder
@@ -5,6 +5,6 @@ json.description book.description
 json.pageUrl book.page_url
 json.coverUrl book.cover_url
 json.editBookPath edit_book_path(book)
-json.mustRead must_read_for_any_practices?(book)
+json.mustRead book.must_read_for_any_practices?
 
 json.practices book.practices, partial: "api/books/practice", as: :practice