diff --git a/assets/javascripts/discourse/routes/user-activity-solved.js b/assets/javascripts/discourse/routes/user-activity-solved.js
index d30ebd0..fa4a674 100644
--- a/assets/javascripts/discourse/routes/user-activity-solved.js
+++ b/assets/javascripts/discourse/routes/user-activity-solved.js
@@ -1,9 +1,9 @@
 import UserActivityStreamRoute from "discourse/routes/user-activity-stream";
 import I18n from "I18n";
 
-export default UserActivityStreamRoute.extend({
-  userActionType: 15,
-  noContentHelpKey: "solved.no_solutions",
+export default class UserActivitySolved extends UserActivityStreamRoute {
+  userActionType = 15;
+  noContentHelpKey = "solved.no_solutions";
 
   emptyState() {
     const user = this.modelFor("user");
@@ -20,5 +20,5 @@ export default UserActivityStreamRoute.extend({
     }
 
     return { title, body };
-  },
-});
+  }
+}