diff --git a/app/javascript/mastodon/features/direct_timeline/components/conversation.js b/app/javascript/mastodon/features/direct_timeline/components/conversation.js
index cc3faf0de..db9381f33 100644
--- a/app/javascript/mastodon/features/direct_timeline/components/conversation.js
+++ b/app/javascript/mastodon/features/direct_timeline/components/conversation.js
@@ -37,6 +37,7 @@ class Conversation extends ImmutablePureComponent {
     onMoveUp: PropTypes.func,
     onMoveDown: PropTypes.func,
     markRead: PropTypes.func.isRequired,
+    delete: PropTypes.func.isRequired,
     intl: PropTypes.object.isRequired,
   };