diff --git a/static/templates/recipient_row.hbs b/static/templates/recipient_row.hbs
index e8bb44af80..cc227bc875 100644
--- a/static/templates/recipient_row.hbs
+++ b/static/templates/recipient_row.hbs
@@ -33,7 +33,7 @@
                 {{! exterior links (e.g. to a trac ticket) }}
                 {{#each topic_links}}
                 <a href="{{this.url}}" target="_blank" rel="noopener noreferrer" class="no-underline">
-                    <i class="fa fa-external-link-square recipient_bar_icon" aria-label="{{t 'External link' }}"></i>
+                    <i class="fa fa-external-link-square recipient_bar_icon" data-tippy-content="Open {{this.text}}" aria-label="{{t 'External link' }}"></i>
                 </a>
                 {{/each}}