diff --git a/src/Monitoring/ThreadWatcher.coffee b/src/Monitoring/ThreadWatcher.coffee
index c68209871..dc3017e3a 100755
--- a/src/Monitoring/ThreadWatcher.coffee
+++ b/src/Monitoring/ThreadWatcher.coffee
@@ -259,6 +259,8 @@ ThreadWatcher =
         ThreadWatcher.db.delete {boardID, threadID}
       else
         data.isDead = true
+        delete data.unread
+        delete data.quotingYou
         ThreadWatcher.db.set {boardID, threadID, val: data}
 
       ThreadWatcher.refresh()