diff --git a/lib/WebGUI/Asset/MatrixListing.pm b/lib/WebGUI/Asset/MatrixListing.pm
index 8ab269c07..9ba704f1b 100644
--- a/lib/WebGUI/Asset/MatrixListing.pm
+++ b/lib/WebGUI/Asset/MatrixListing.pm
@@ -449,6 +449,23 @@ sub setRatings {
 
 =head2 view ( hasRated )
 
+Updates the score of a MatrixListing. 
+
+=cut
+
+sub updateScore {
+    my $self = shift;
+    my $score = $self->session->db->quickScalar("select sum(value) from MatrixListing_attribute 
+            left join Matrix_attribute using(attributeId) 
+            where matrixListingId = ? and fieldType = 'MatrixCompare'",[$self->getId]);
+    $self->update({score => $score});
+    return undef;
+}
+
+#-------------------------------------------------------------------
+
+=head2 view ( hasRated )
+
 method called by the container www_view method. 
 
 =head3 hasRated
diff --git a/lib/WebGUI/Asset/Wobject/Matrix.pm b/lib/WebGUI/Asset/Wobject/Matrix.pm
index da641c354..54a0dfb8b 100644
--- a/lib/WebGUI/Asset/Wobject/Matrix.pm
+++ b/lib/WebGUI/Asset/Wobject/Matrix.pm
@@ -201,6 +201,17 @@ sub deleteAttribute {
     my $attributeId = shift;
 
     $self->deleteCollateral("Matrix_attribute","attributeId",$attributeId);
+    $self->session->db->write("delete from MatrixListing_attribute where attributeId=? and matrixId=?",
+        [$attributeId,$self->getId]);
+
+    # recalculate scores for MatrixListings
+    my @listings = @{ $self->getLineage(['descendants'], {
+            includeOnlyClasses  => ['WebGUI::Asset::MatrixListing'],
+            returnObjects       => 1,
+        }) };
+    foreach my $listing (@listings){
+        $listing->updateScore;
+    }
 
     return undef;
 }