diff --git a/www/manager6/ceph/Pool.js b/www/manager6/ceph/Pool.js
index d5cb5d40..41c08c39 100644
--- a/www/manager6/ceph/Pool.js
+++ b/www/manager6/ceph/Pool.js
@@ -144,6 +144,7 @@ Ext.define('PVE.CephPoolInputPanel', {
 	    allowBlank: true,
 	    allowZero: true,
 	    emptyText: '0',
+	    emptyValue: 0,
 	    autoEl: {
 		tag: 'div',
 		'data-qtip': gettext('The amount of data eventually stored in this pool. Used for auto-scaling.'),