diff --git a/src/Monitoring/Unread.coffee b/src/Monitoring/Unread.coffee
index c31c63b56..da1419be5 100644
--- a/src/Monitoring/Unread.coffee
+++ b/src/Monitoring/Unread.coffee
@@ -125,9 +125,8 @@ Unread =
       break if bottom > height # post is not completely read
     return unless i
 
-    Unread.lastReadPost = Unread.posts[i - 1].ID
+    Unread.lastReadPost = Unread.posts.splice(0, i)[i - 1].ID
     Unread.saveLastReadPost()
-    Unread.posts.splice 0, i
     Unread.readArray Unread.postsQuotingYou
     Unread.update() if e