diff --git a/less/nav.less b/less/nav.less
index 38fa718..9e8fe67 100644
--- a/less/nav.less
+++ b/less/nav.less
@@ -4,6 +4,7 @@
 @nav-default-item-active-font-weight: 600;
 
 @nav-item-padding-horizontal: 30px;
+@nav-sublist-padding-vertical: 10px;
 @nav-sublist-padding-left: 45px;
 
 @nav-default-sublist-item-color: @nav-default-item-color;