diff --git js/wysiwyg-media.js js/wysiwyg-media.js
index 156229a..c405223 100644
--- js/wysiwyg-media.js
+++ js/wysiwyg-media.js
@@ -83,7 +83,7 @@ Drupal.wysiwyg.plugins.media = {
     if (additional) {
       for (k in additional) {
         if (additional.hasOwnProperty(k)) {
-          if (k === 'attr') {
+          if (k === 'alt') {
             imgElement.attr(k, additional[k]);
           }
         }