diff --git a/lib/src/gpx_writer.dart b/lib/src/gpx_writer.dart
index e3f56fb..8a28f90 100644
--- a/lib/src/gpx_writer.dart
+++ b/lib/src/gpx_writer.dart
@@ -182,6 +182,7 @@ class GpxWriter {
         _writeElement(builder, GpxTagV11.desc, wpt.desc);
         _writeElement(builder, GpxTagV11.comment, wpt.cmt);
         _writeElement(builder, GpxTagV11.type, wpt.type);
+        _writeElement(builder, GpxTagV11.sym, wpt.sym);
 
         _writeExtensions(builder, wpt.extensions);