diff --git a/media/css/impala/header.less b/media/css/impala/header.less
index 5298abea4ca..1f69ed9eb7c 100644
--- a/media/css/impala/header.less
+++ b/media/css/impala/header.less
@@ -232,7 +232,7 @@
                 &:hover {
                     a {
                         background: transparent;
-                        .box-shadow(~"0 0");
+                        .box-shadow(0 0 inset);
                         border-color: transparent;
                     }
                     &:after {