diff --git a/public/src/modules/helpers.js b/public/src/modules/helpers.js
index 7d79265b84..b0f48d6f15 100644
--- a/public/src/modules/helpers.js
+++ b/public/src/modules/helpers.js
@@ -102,6 +102,10 @@
 			style.push('unread');
 		}
 
+		if (topic.extraClass) {
+			style.push(topic.extraClass);
+		}
+
 		return style.join(' ');
 	};