diff --git a/app/javascript/mastodon/components/autosuggest_textarea.js b/app/javascript/mastodon/components/autosuggest_textarea.js
index 14a8d4c38..6a16e2fc7 100644
--- a/app/javascript/mastodon/components/autosuggest_textarea.js
+++ b/app/javascript/mastodon/components/autosuggest_textarea.js
@@ -209,6 +209,7 @@ export default class AutosuggestTextarea extends ImmutablePureComponent {
             onBlur={this.onBlur}
             onPaste={this.onPaste}
             style={style}
+            aria-autocomplete='list'
           />
         </label>