diff --git a/js/src/forum/components/DiscussionPage.js b/js/src/forum/components/DiscussionPage.js
index cffc15ee6..6f4780b8e 100644
--- a/js/src/forum/components/DiscussionPage.js
+++ b/js/src/forum/components/DiscussionPage.js
@@ -140,7 +140,7 @@ export default class DiscussionPage extends Page {
       'poststream',
       <div className="DiscussionPage-stream">
         {PostStream.component({
-          discussion,
+          discussion: this.discussion,
           stream: this.stream,
           onPositionChange: this.positionChanged.bind(this),
         })}