diff --git a/packages/docusaurus-theme-classic/src/theme/Navbar/MobileSidebar/Layout/index.tsx b/packages/docusaurus-theme-classic/src/theme/Navbar/MobileSidebar/Layout/index.tsx
index b3bbaec8fae0..84ebde5e9cc6 100644
--- a/packages/docusaurus-theme-classic/src/theme/Navbar/MobileSidebar/Layout/index.tsx
+++ b/packages/docusaurus-theme-classic/src/theme/Navbar/MobileSidebar/Layout/index.tsx
@@ -19,12 +19,12 @@ export default function NavbarMobileSidebarLayout({
   return (
     <div className="navbar-sidebar">
       {header}
-      <div
-        className={clsx('navbar-sidebar__items', {
-          'navbar-sidebar__items--show-secondary': secondaryMenuShown,
-        })}>
-        <div className="navbar-sidebar__item menu">{primaryMenu}</div>
-        <div className="navbar-sidebar__item menu">{secondaryMenu}</div>
+      <div className={clsx('navbar-sidebar__items')}>
+        {secondaryMenuShown ? (
+          <div className="navbar-sidebar__item menu">{secondaryMenu}</div>
+        ) : (
+          <div className="navbar-sidebar__item menu">{primaryMenu}</div>
+        )}
       </div>
     </div>
   );