diff --git a/addthis_displays/addthis_displays.addthis.inc b/addthis_displays/addthis_displays.addthis.inc
index 87ac624..cdc4392 100644
--- a/addthis_displays/addthis_displays.addthis.inc
+++ b/addthis_displays/addthis_displays.addthis.inc
@@ -107,6 +107,7 @@ function addthis_displays_addthis_display_markup__addthis_basic_button($options
     '#tag' => 'img',
     '#attributes' => array(
       'src' => $button_img,
+      'alt' => t('Share page with AddThis'),
     ),
   );
   $element[] = $image;