diff --git a/public/src/client/topic/posts.js b/public/src/client/topic/posts.js
index 57626e24aa..18d22cbc78 100644
--- a/public/src/client/topic/posts.js
+++ b/public/src/client/topic/posts.js
@@ -202,7 +202,9 @@ define('forum/topic/posts', [
 					done();
 				});
 			} else {
-				socket.emit('topics.markAsRead', [tid]);
+				if (app.uid) {
+					socket.emit('topics.markAsRead', [tid]);
+				}
 				navigator.update();
 				done();
 			}