diff --git a/components/o-header/src/scss/_variables.scss b/components/o-header/src/scss/_variables.scss
index 61db2a6c36..6856bed7b1 100644
--- a/components/o-header/src/scss/_variables.scss
+++ b/components/o-header/src/scss/_variables.scss
@@ -7,7 +7,7 @@ $_o-header-padding-y: 8px;
 $_o-header-buttons-theme: 'mono';
 $_o-header-mega-padding-x: 24px;
 $_o-header-mega-padding-y: 18px;
-$_o-header-mega-z-index: 1;
+$_o-header-mega-z-index: 5;
 $_o-header-z-index: 10;
 $_o-header-drawer-z-index: 100;
 $_o-header-drawer-width: 320px;