diff --git a/frontend/src/pages/DeviceDetail.tsx b/frontend/src/pages/DeviceDetail.tsx
index 9d1df2f..034a92d 100644
--- a/frontend/src/pages/DeviceDetail.tsx
+++ b/frontend/src/pages/DeviceDetail.tsx
@@ -472,16 +472,16 @@ export function DeviceDetailPage() {
                   </Tooltip>
                 ) : '—'}
               </Descriptions.Item>
-              {device.last_seen && device.last_ping_at !== device.last_seen && (
-                <Descriptions.Item label="Онлайн был">
+              <Descriptions.Item label="Онлайн был">
+                {device.last_seen ? (
                   <Tooltip title={elapsedAgo(device.last_seen)}>
                     <Space size={4} style={{ cursor: 'default' }}>
                       <ClockCircleOutlined style={{ color: '#52c41a' }} />
                       <span>{dayjs(device.last_seen).format('DD.MM.YYYY HH:mm:ss')}</span>
                     </Space>
                   </Tooltip>
-                </Descriptions.Item>
-              )}
+                ) : '—'}
+              </Descriptions.Item>
               <Descriptions.Item label="Мониторинг">
                 {device.monitor_enabled
                   ? <Tag color="green">Включён</Tag>