diff --git a/src/tree-select/index.less b/src/tree-select/index.less
index 2ced37ec2..047d95414 100644
--- a/src/tree-select/index.less
+++ b/src/tree-select/index.less
@@ -27,7 +27,7 @@
   &__item {
     position: relative;
     padding: 0 32px 0 @padding-md;
-    font-weight: bold;
+    font-weight: @font-weight-bold;
     line-height: @tree-select-item-height;
     cursor: pointer;