diff --git a/data/presets/natural/tree.json b/data/presets/natural/tree.json
index 7a5272fe..7ae7aacb 100644
--- a/data/presets/natural/tree.json
+++ b/data/presets/natural/tree.json
@@ -13,7 +13,8 @@
         "species/wikidata",
         "taxon",
         "diameter_crown",
-        "diameter"
+        "diameter",
+        "ref"
     ],
     "geometry": [
         "point",