diff --git a/public/css/icinga/layout-structure.less b/public/css/icinga/layout-structure.less
index f216a6be4..b1ca8e65a 100644
--- a/public/css/icinga/layout-structure.less
+++ b/public/css/icinga/layout-structure.less
@@ -14,8 +14,6 @@ body {
   height: 100%;
   display: flex;
   flex-direction: column;
-  // Prevent nav-level-2 flyovers from being covered by #main
-  z-index: 0;
 }
 
 #content-wrapper {
diff --git a/public/css/icinga/menu.less b/public/css/icinga/menu.less
index 7933b6358..98650a237 100644
--- a/public/css/icinga/menu.less
+++ b/public/css/icinga/menu.less
@@ -31,10 +31,6 @@
       text-decoration: none;
     }
   }
-
-  .nav-level-2 {
-    z-index: 1;
-  }
 }
 
 #layout:not(.sidebar-collapsed) #menu .nav-item > a:first-of-type {