diff --git a/HeaderRow.js b/HeaderRow.js
index f929cc6..983ee0e 100644
--- a/HeaderRow.js
+++ b/HeaderRow.js
@@ -23,7 +23,7 @@ function HeaderRow(spreadsheet, sheetName, headerRowNumber, startColumnNumber, c
 }
 
 HeaderRow.prototype = {
-  constructor: HeaderRow,
+  constructor: 'HeaderRow',
   freezeHeaderRow: function () {
     var sheet = this.sheet;
     sheet.setFrozenRows(this.headerRowNumber);
@@ -36,7 +36,7 @@ HeaderRow.prototype = {
   },
   addCommentToColumn: function (comment, headerRowColumnNumber) {
     var cellToComment = this.headerRowRange.getCell(1, headerRowColumnNumber);
-    cellToComment.setComment(comment);
+    cellToComment.setNote(comment);
   },
   addColumnTitlesToHeaderRow: function () {
     var i,