diff --git a/src/Monitoring/ThreadWatcher.coffee b/src/Monitoring/ThreadWatcher.coffee
index be6cbb98a..788ea903d 100755
--- a/src/Monitoring/ThreadWatcher.coffee
+++ b/src/Monitoring/ThreadWatcher.coffee
@@ -147,7 +147,7 @@ ThreadWatcher =
           unread = 0
 
           for postObj in @response.posts
-            if postObj.no > lastReadPost
+            if postObj.no > lastReadPost and !QR.db?.get {boardID, threadID, postID: postObj.no}
               unread++
 
           if unread isnt data.unread