diff --git a/js/src/forum/pages/discussions/PrivateDiscussionComposer.js b/js/src/forum/pages/discussions/PrivateDiscussionComposer.js
index 05ef87f..55bc2fc 100644
--- a/js/src/forum/pages/discussions/PrivateDiscussionComposer.js
+++ b/js/src/forum/pages/discussions/PrivateDiscussionComposer.js
@@ -104,7 +104,8 @@ export default class PrivateDiscussionComposer extends DiscussionComposer {
   }
 
   addDefaultRecipients(username) {
-    const user = app.store.getBy('users', 'username', username);
+    console.log(username);
+    const user = app.store.getBy('users', 'slug', username);
 
     this.composer.fields.recipients.add('users:' + app.session.user.id(), app.session.user);