diff --git a/modules/ui/markers-overview.js b/modules/ui/markers-overview.js
index 10ac506d..8ed5bba5 100644
--- a/modules/ui/markers-overview.js
+++ b/modules/ui/markers-overview.js
@@ -171,13 +171,15 @@ function overviewMarkers() {
 
   function exportMarkers() {
     const headers = "Id,Type,Icon,Name,Note,X,Y\n";
+    const quote = s => '"' + s.replace('"', "'") + '"';
 
     const body = pack.markers.map(marker => {
       const {i, type, icon, x, y} = marker;
       const id = `marker${i}`;
       const note = notes.find(note => note.id === id);
-      const legend = escape(note.legend);
-      return [id, type, icon, note.name, legend, x, y].join(",");
+      const name = note ? quote(note.name) : 'Unknown';
+      const legend = note ? quote(note.legend) : '';
+      return [id, type, icon, name, legend, x, y].join(",");
     });
 
     const data = headers + body.join("\n");