diff --git a/browser/main/NoteList/index.js b/browser/main/NoteList/index.js
index 0135e626..04ec9ff6 100644
--- a/browser/main/NoteList/index.js
+++ b/browser/main/NoteList/index.js
@@ -66,6 +66,7 @@ class NoteList extends React.Component {
     this.handleNoteListKeyUp = this.handleNoteListKeyUp.bind(this)
     this.deleteNote = this.deleteNote.bind(this)
     this.focusNote = this.focusNote.bind(this)
+    this.pinToTop = this.pinToTop.bind(this)
 
     // TODO: not Selected noteKeys but SelectedNote(for reusing)
     this.state = {