diff --git a/app/assets/javascripts/map.js.erb b/app/assets/javascripts/map.js.erb
index fd5962d4f..529934048 100644
--- a/app/assets/javascripts/map.js.erb
+++ b/app/assets/javascripts/map.js.erb
@@ -196,7 +196,6 @@ function openMapPopup(marker, description) {
 function closeMapPopup() {
    if (popup) {
       map.removePopup(popup);
-      delete popup;
    }
 }