diff --git a/framework/core/js/src/forum/components/PostStreamScrubber.js b/framework/core/js/src/forum/components/PostStreamScrubber.js
index 7da2c42e1..b6955b611 100644
--- a/framework/core/js/src/forum/components/PostStreamScrubber.js
+++ b/framework/core/js/src/forum/components/PostStreamScrubber.js
@@ -42,7 +42,7 @@ export default class PostStreamScrubber extends Component {
       const newStyle = {
         top: 100 - unreadPercent * 100 + '%',
         height: unreadPercent * 100 + '%',
-        opacity: unreadPercent ? 1 : 0,
+        opacity: unreadPercent > 0 ? 1 : 0,
       };
 
       if (vnode.state.oldStyle) {