diff --git a/umap/static/umap/map.css b/umap/static/umap/map.css
index e34e1751..f36696bc 100644
--- a/umap/static/umap/map.css
+++ b/umap/static/umap/map.css
@@ -9,6 +9,11 @@
     bottom: 0;
     left: 0;
     right: 0;
+    /*
+    * Same as leaflet background, to work around screen blincking
+    * between DOM is loaded and JS is read to render the map.
+    */
+    background-color: #ddd;
 }