diff --git a/frontend-js/src/main/js/map/CustomMap.js b/frontend-js/src/main/js/map/CustomMap.js
index 9759aea82818fdce466b28a226784450d2ac9c3f..2ac17138f5e00f0edaf7fa3b7a548a0c2b7a40bb 100644
--- a/frontend-js/src/main/js/map/CustomMap.js
+++ b/frontend-js/src/main/js/map/CustomMap.js
@@ -200,7 +200,7 @@ CustomMap.prototype.reRenderDbOverlay = function(dbOverlay, fitBounds) {
  *          identifier or LayoutData identifing data overlay to open
  */
 CustomMap.prototype.openDataOverlay = function(param) {
-  logger.debug("Opening data overlay: " + identifier);
+  logger.debug("Opening data overlay: " + param);
 
   var self = this;
   var identifier = param;