diff --git a/app/assets/javascripts/sidebar/components/participants/participants.vue b/app/assets/javascripts/sidebar/components/participants/participants.vue
index 650aa603f18a057372b029677a9af9efd941719d..4ea72341aff23def511b8fb45cebcd137e5170a0 100644
--- a/app/assets/javascripts/sidebar/components/participants/participants.vue
+++ b/app/assets/javascripts/sidebar/components/participants/participants.vue
@@ -111,6 +111,7 @@ export default {
             :img-src="participant.avatar_url || participant.avatarUrl"
             :size="24"
             :tooltip-text="participant.name"
+            :img-alt="participant.name"
             css-classes="avatar-inline"
             tooltip-placement="bottom"
           />