diff --git a/src/Quotelinks/QuoteThreading.coffee b/src/Quotelinks/QuoteThreading.coffee
index 7b77a13a3..2ac2d695f 100755
--- a/src/Quotelinks/QuoteThreading.coffee
+++ b/src/Quotelinks/QuoteThreading.coffee
@@ -97,7 +97,7 @@ QuoteThreading =
     if post = posts[post.ID]
       posts.after post, posts[@ID]
 
-    else
+    else if posts[@ID]
       posts.prepend posts[@ID]
 
     return true
@@ -128,4 +128,4 @@ QuoteThreading =
   kb: ->
     control = $.id 'threadingControl'
     control.checked = not control.checked
-    QuoteThreading.toggle.call control
\ No newline at end of file
+    QuoteThreading.toggle.call control