diff --git a/core/code/portal_marker.js b/core/code/portal_marker.js
index 589fc6d73..300ddf7a8 100644
--- a/core/code/portal_marker.js
+++ b/core/code/portal_marker.js
@@ -83,8 +83,9 @@ L.PortalMarker = L.CircleMarker.extend({
 
       // we got more details
       if (this._details.timestamp == details.timestamp) {
+        var localThis = this;
         ["mods", "resonators", "owner", "artifactDetail", "history"].forEach(function (prop) {
-          if (details[prop]) this._details[prop] = details[prop];
+          if (details[prop]) localThis._details[prop] = details[prop];
         });
         // LEGACY - TO BE REMOVED AT SOME POINT! use .guid, .timestamp and .data instead
         this._details.ent = details.ent;