diff --git a/js/forum/src/components/PostStream.js b/js/forum/src/components/PostStream.js
index 3b27884c4..e88f9adcb 100644
--- a/js/forum/src/components/PostStream.js
+++ b/js/forum/src/components/PostStream.js
@@ -122,7 +122,7 @@ class PostStream extends Component {
    * @public
    */
   update() {
-    if (!this.viewingEnd) return;
+    if (!this.viewingEnd) return Promise.resolve();
 
     this.visibleEnd = this.count();