diff --git a/src/core/js/ext_map.js b/src/core/js/ext_map.js
index e0b5fafd55e39cd0a8ddef6afbe6f4dc8a7f096d..c810163d2444c11fdf0c8ab16cb6b10d72c76eda 100644
--- a/src/core/js/ext_map.js
+++ b/src/core/js/ext_map.js
@@ -881,6 +881,7 @@ var caosdb_map = new function () {
 
         this.show_map = function () {
             logger.trace("enter show_map");
+            sessionStorage["caosdb_map.show"] = "true";
             $(".caosdb-f-map-panel").show(900, () => this
                 ._toggle_cb());
         }