diff --git a/src/core/js/ext_map.js b/src/core/js/ext_map.js
index f0283cddc4940dc5ac56594a0a1b2fda7f9ea047..2bf31cdff5617da9053e31d346a533bc2f851ada 100644
--- a/src/core/js/ext_map.js
+++ b/src/core/js/ext_map.js
@@ -376,6 +376,8 @@ var caosdb_map = new function () {
      * @callback {mapEntityPopupGenerator}
      * @param {HTMLElement} entity - in HTML representation
      * @param {DataModelConfig} datamodel
+     * @param {Number} lat - latitude
+     * @param {Number} lng - longitude
      * @return {HTMLElement} a popup element.
      */
 
@@ -598,6 +600,8 @@ var caosdb_map = new function () {
      * @param {HTMLElement} entity - an entity in HTML representation.
      * @param {DataModelConfig} datamodel - configuration of the properties
      *     used for the coordinates.
+     * @param {Number} lat - latitude
+     * @param {Number} lng - longitude
      * @returns {HTMLElement} a popup element.
      */
     this._make_map_popup = function (entity, datamodel, lat, lng) {