diff --git a/docs/changelog/7.x.x.txt b/docs/changelog/7.x.x.txt
index fede7d2f5..cb9da8ed5 100644
--- a/docs/changelog/7.x.x.txt
+++ b/docs/changelog/7.x.x.txt
@@ -28,6 +28,7 @@
    arbitrarily.
  - fix: Event Related Links are now proper collateral in their own table
    instead of a silly HTML area
+ - fix: rating archived posts causes error
 
 7.4.21
  - fix: Mails sent from WebGUI now wrap at 78 characters, as the SMTP
diff --git a/lib/WebGUI/Asset/Post/Thread.pm b/lib/WebGUI/Asset/Post/Thread.pm
index 07e903fa4..3fe020199 100644
--- a/lib/WebGUI/Asset/Post/Thread.pm
+++ b/lib/WebGUI/Asset/Post/Thread.pm
@@ -818,8 +818,9 @@ sub updateThreadRating {
 
     my $calcRating  = 0; 
     my $postIds     = $self->getLineage(["descendants","self"], {
-        includeOnlyClasses => ["WebGUI::Asset::Post","WebGUI::Asset::Post::Thread"],
-    });  
+        includeOnlyClasses  => ["WebGUI::Asset::Post","WebGUI::Asset::Post::Thread"],
+        includeArchived     => 1,
+    });
 
     $calcRating += $session->db->quickScalar(
         "SELECT SUM(rating) FROM Post_rating WHERE assetId IN (".$session->db->quoteAndJoin($postIds).")"