diff --git a/frontend-js/src/main/js/map/data/Project.js b/frontend-js/src/main/js/map/data/Project.js
index 2be582eceb31f65fe94aec88901df77c3b66b9c8..1326dd9c8088247a5013c5fff94b2042a0972186 100644
--- a/frontend-js/src/main/js/map/data/Project.js
+++ b/frontend-js/src/main/js/map/data/Project.js
@@ -381,7 +381,7 @@ Project.prototype.setNotifyEmail = function (notifyEmail) {
 /**
  *
  * @param {DataOverlay} overlay
- * @param {boolean} updateWhenExists
+ * @param {boolean} [updateWhenExists=false]
  */
 Project.prototype.addDataOverlay = function (overlay, updateWhenExists) {
   var overlayToAdd = null;