diff --git a/umap/static/umap/js/umap.js b/umap/static/umap/js/umap.js
index e8dc0d12..27f3aeed 100644
--- a/umap/static/umap/js/umap.js
+++ b/umap/static/umap/js/umap.js
@@ -1009,6 +1009,7 @@ L.U.Map.include({
         'captionBar',
         'slideshow',
         'sortKey',
+        'labelKey',
         'filterKey',
         'showLabel',
         'labelDirection',