diff --git a/components/dropdown/style/index.less b/components/dropdown/style/index.less
index 17651037a1..3acb49345d 100644
--- a/components/dropdown/style/index.less
+++ b/components/dropdown/style/index.less
@@ -235,11 +235,11 @@
         background-color: @border-color-split;
       }
 
-      .@{dropdown-prefix-cls}-menu-submenu-arrow {
+      .@{dropdown-prefix-cls}-menu-submenu-expand-icon {
         position: absolute;
         right: @padding-xs;
 
-        &-icon {
+        .@{dropdown-prefix-cls}-menu-submenu-arrow-icon {
           margin-right: 0 !important;
           color: @text-color-secondary;
           font-size: 10px;