diff --git a/src/plugins/navigation/public/top_nav_menu/top_nav_menu_item.tsx b/src/plugins/navigation/public/top_nav_menu/top_nav_menu_item.tsx
index 16017fda0ffbc..84232d47fd337 100644
--- a/src/plugins/navigation/public/top_nav_menu/top_nav_menu_item.tsx
+++ b/src/plugins/navigation/public/top_nav_menu/top_nav_menu_item.tsx
@@ -80,7 +80,12 @@ export function TopNavMenuItem(props: TopNavMenuData & { isMobileMenu?: boolean
       </EuiToolTip>
     ) : props.emphasize ? (
       // fill is not compatible with EuiHeaderLink
-      <EuiButton size="s" {...commonButtonProps} fill={props.fill ?? true}>
+      <EuiButton
+        size="s"
+        fullWidth={props.isMobileMenu}
+        {...commonButtonProps}
+        fill={props.fill ?? true}
+      >
         {getButtonContainer()}
       </EuiButton>
     ) : (