diff --git a/browser/main/Detail/MarkdownNoteDetail.js b/browser/main/Detail/MarkdownNoteDetail.js
index dd3744db..45f0442f 100644
--- a/browser/main/Detail/MarkdownNoteDetail.js
+++ b/browser/main/Detail/MarkdownNoteDetail.js
@@ -66,10 +66,10 @@ class MarkdownNoteDetail extends React.Component {
     let splitted = value.split('\n')
     let title = null
     let isMarkdownInCode = false
-
+1
     for (let i = 0; i < splitted.length; i++) {
       let trimmedLine = splitted[i].trim()
-      let trimmedNextLine = splitted[i + 1].trim()
+      let trimmedNextLine = typeof splitted[i + 1] === 'undefined' ? '' : splitted[i + 1].trim()
       if (trimmedLine.match('```')) {
         isMarkdownInCode = !isMarkdownInCode
       } else if (isMarkdownInCode === false && (trimmedLine.match(/^# +/) || trimmedNextLine.match('='))) {