diff --git a/umap/static/umap/js/umap.layer.js b/umap/static/umap/js/umap.layer.js
index 8ad25de5..7fafaea1 100644
--- a/umap/static/umap/js/umap.layer.js
+++ b/umap/static/umap/js/umap.layer.js
@@ -797,6 +797,7 @@ L.U.DataLayer = L.Evented.extend({
   },
 
   setOptions: function (options) {
+    delete options.geojson
     this.options = L.Util.CopyJSON(L.U.DataLayer.prototype.options) // Start from fresh.
     this.updateOptions(options)
   },