diff --git a/www/manager6/dc/Backup.js b/www/manager6/dc/Backup.js
index d3db9d9..aace085 100644
--- a/www/manager6/dc/Backup.js
+++ b/www/manager6/dc/Backup.js
@@ -124,6 +124,9 @@ Ext.define('PVE.dc.BackupEdit', {
                     id: 'poolFilter',
                     property: 'pool',
                     value: poolid,
+                    // a plain string filter would also match child pools like 'poolid/child'
+                    exactMatch: true,
+                    caseSensitive: true,
                 },
             ]);
             vmgrid.selModel.selectAll(true);