diff --git a/public/css/icinga/menu.less b/public/css/icinga/menu.less
index 58e31b7bf..14a35a86e 100644
--- a/public/css/icinga/menu.less
+++ b/public/css/icinga/menu.less
@@ -29,6 +29,7 @@
 }
 
 #menu .nav-level-1 > .nav-item {
+  border-left: 5px solid transparent;
   line-height: 2.167em; // 26 px
 
   &.active {
@@ -42,7 +43,7 @@
     }
 
     background-color: @body-bg-color;
-    border-left: 5px solid @icinga-blue;
+    border-color: @icinga-blue;
   }
 
   &.no-icon > a {