diff --git a/addons/web/static/src/webclient/navbar/navbar.scss b/addons/web/static/src/webclient/navbar/navbar.scss
index f2b373c8e43..4705bd09b38 100644
--- a/addons/web/static/src/webclient/navbar/navbar.scss
+++ b/addons/web/static/src/webclient/navbar/navbar.scss
@@ -124,13 +124,7 @@
 // = SuperUser Design
 // ============================================================================
 body.o_is_superuser .o_menu_systray {
-    position: relative;
-    background: repeating-linear-gradient(135deg, #d9b904, #d9b904 10px, #373435 10px, #373435 20px);
-
-    &:before {
-        content: "";
-        @include o-position-absolute(2px, 2px, 2px, 2px);
-        background-color: $o-brand-odoo;
-    }
+    border-image: repeating-linear-gradient(135deg, #d9b904, #d9b904 10px, #373435 10px, #373435 20px) 2;
+    border-image-width: map-get($border-widths, 2);
 }