diff --git a/admin/reports.inc.php b/admin/reports.inc.php
index 0861e48..4f882e2 100644
--- a/admin/reports.inc.php
+++ b/admin/reports.inc.php
@@ -650,11 +650,13 @@ foreach($report_stock as $n=>$v) {
 
 		if($n_groups > 0) {
 			$group_change = false;
-			for($x=0; $x<$n_groups; $x++) {
-				if($last_group_data["G$x"] != $i["G$x"]) {
+			/* See if any of the "group" fields have changed */
+			foreach($report['group'] as $x=>$g) {
+				$f = $g['field'];
+				$c = $fieldname[$f];				
+				if($last_group_data[$c] != $i[$c])
 					$group_change = true;
-				}
-				$last_group_data["G$x"] = $i["G$x"];
+				$last_group_data[$c] = $i[$c];
 			}
 
 			if($group_change) {