diff --git a/packages/theme-default/src/scrollbar.css b/packages/theme-default/src/scrollbar.css
index dfde668cb..e4e3a3ca6 100644
--- a/packages/theme-default/src/scrollbar.css
+++ b/packages/theme-default/src/scrollbar.css
@@ -1,3 +1,6 @@
+@charset "UTF-8";
+@import "./common/var.css";
+
 @component-namespace el {
   @b scrollbar {
     overflow: hidden;