diff --git a/src/js/mep-player.js b/src/js/mep-player.js
index <HASH>..<HASH> 100644
--- a/src/js/mep-player.js
+++ b/src/js/mep-player.js
@@ -1002,7 +1002,7 @@
 				posterImg = posterDiv.find('img');
 
 			if (posterImg.length === 0) {
-				posterImg = $('<img width="100%" height="100%" />').appendTo(posterDiv);
+				posterImg = $('<img width="100%" height="100%" alt="" />').appendTo(posterDiv);
 			}
 
 			posterImg.attr('src', url);
Fix validation issue with generated poster image

The image should have an empty `alt` attribute (decoration).