diff --git a/components/collapse/style/index.less b/components/collapse/style/index.less
index d96f613825..4354572e50 100644
--- a/components/collapse/style/index.less
+++ b/components/collapse/style/index.less
@@ -33,6 +33,7 @@
       line-height: 22px;
       cursor: pointer;
       transition: all 0.3s;
+      .clearfix;
 
       .@{collapse-prefix-cls}-rtl & {
         padding: @collapse-header-padding;