diff --git a/src/layer/marker/Marker.js b/src/layer/marker/Marker.js
index 78f39145774..7561e9679a2 100644
--- a/src/layer/marker/Marker.js
+++ b/src/layer/marker/Marker.js
@@ -209,6 +209,7 @@ L.Marker = L.Layer.extend({
 
 		if (newShadow) {
 			L.DomUtil.addClass(newShadow, classToAdd);
+			newShadow.alt = '';
 		}
 		this._shadow = newShadow;