1 files changed, 5 insertions, 0 deletions
diff --git a/lib/output/ebook.js b/lib/output/ebook.js
index fc9cfd7..801d058 100644
--- a/lib/output/ebook.js
+++ b/lib/output/ebook.js
@@ -159,4 +159,9 @@ EbookOutput.prototype.ebookConvertOption = function() {
     });
 };
 
+// Don't write multi-lingual index for wbook
+EbookOutput.prototype.outputMultilingualIndex = function() {
+
+};
+
 module.exports = EbookOutput;