diff --git a/inc/helpers/header/aksrt-header-navbar.php b/inc/helpers/header/aksrt-header-navbar.php
index cd85d762..0fb66051 100644
--- a/inc/helpers/header/aksrt-header-navbar.php
+++ b/inc/helpers/header/aksrt-header-navbar.php
@@ -339,7 +339,7 @@ if (!function_exists('aksrt_menu_button')) :
 
 		$fold = '<div class="navbar-form navbar-right hide show-nav-but" style="margin-right:-10px;">'
 			. '<a data-toggle-class data-target=".nav.navbar-nav" href="javascript:;" class="but" aria-label="'
-			. esc_attr__('展开菜单', 'aksrt') . '"><svg class="icon" aria-hidden="true"><use xlink:href="#icon-menu_2"></use></svg></a></div>';
+			. esc_attr__('展开菜单', 'aksrt') . '"><svg class="icon" viewBox="0 0 1024 1024" aria-hidden="true"><use xlink:href="#icon-menu_2"></use></svg></a></div>';
 
 		$html = $fold . $button;