--- a/displayAmendments.php
+++ b/displayAmendments.php
@@ -1,7 +1,7 @@
 <?php
 include_once ("./lib/common.inc.php");
     include_header("Amendments");
-$query = "select CNID, description, value, pvalue, (value - pvalue) as diff from contractnotice, (SELECT CNID as cn, childCN as ccn, value as pvalue FROM contractnotice where childCN > 0) a".
+$query = "select CNID, description, value, pvalue, (value - pvalue) as diff from contractnotice, (SELECT CNID as cn, childCN as ccn, value as pvalue FROM contractnotice where childCN is not null) a".
 " where ".$agencyQ.$yearQ."CNID = ccn AND (value - pvalue) <> 0 order by diff DESC";
 $result = mysql_query($query);
   echo "<table>  <thead>