diff --git a/resources/server/src/landingpage/src/js/WmsSource.js b/resources/server/src/landingpage/src/js/WmsSource.js
index 4f21229a06eb..2f0c0b5a4c7b 100644
--- a/resources/server/src/landingpage/src/js/WmsSource.js
+++ b/resources/server/src/landingpage/src/js/WmsSource.js
@@ -101,6 +101,11 @@ var WmsSource = WMS.Source.extend({
     }
     return result
   },
+  onRemove: function () {
+    if (this._overlay) {
+      delete this._overlay;
+    }
+  }
 })
 
 export default {