diff --git a/components/tooltip/style/index.less b/components/tooltip/style/index.less
index 697f685574..129ab7fc43 100644
--- a/components/tooltip/style/index.less
+++ b/components/tooltip/style/index.less
@@ -201,7 +201,7 @@
     }
     .@{tooltip-prefix-cls}-arrow {
       &-content::before {
-        background-color: @@lightColor;
+        background: @@lightColor;
       }
     }
   }