diff --git a/src/mapml.css b/src/mapml.css
index 2c737b4d0..54d3370be 100644
--- a/src/mapml.css
+++ b/src/mapml.css
@@ -36,7 +36,9 @@
 }
 
 /* Remove opinionated color of links. */
-.leaflet-container a {
+.leaflet-container a,
+.leaflet-container a.leaflet-popup-close-button,
+.leaflet-container a.leaflet-popup-close-button:hover {
   color: initial;
 }