--- a/displayHeatmap.php
+++ b/displayHeatmap.php
@@ -26,7 +26,7 @@
 $white = imagecolorallocate($handle, 0, 0, 0);
 imagecolortransparent($handle, $white);
 
-$query = 'SELECT "supplierPostcode", sum("value") as value, max(lat) as lat, max(lon) as lon FROM contractnotice inner join postcodes on "supplierPostcode" = postcode::text where "childCN" = 0 AND "supplierCountry" = \'Australia\' GROUP BY "supplierPostcode"';
+$query = 'SELECT "supplierPostcode", sum("value") as value, max(lat) as lat, max(lon) as lon FROM contractnotice inner join postcodes on "supplierPostcode" = postcode::text where "childCN" is null AND "supplierCountry" = \'Australia\' GROUP BY "supplierPostcode"';
 $query = $conn->prepare($query);
    $query->execute();
    if (!$query) {