diff --git a/components/layout/style/sider.ts b/components/layout/style/sider.ts
index 10790a5f9a..c27a083ce9 100644
--- a/components/layout/style/sider.ts
+++ b/components/layout/style/sider.ts
@@ -69,7 +69,7 @@ const genSiderStyle: GenerateStyle<LayoutToken, CSSObject> = (token) => {
         transition: `all ${motionDurationMid}`,
       },
 
-      '&-zero-width': {
+      [`${antCls}-layout &-zero-width`]: {
         '> *': {
           overflow: 'hidden',
         },