diff --git a/404.html b/404.html
index 25b6bfb..1e85036 100644
--- a/404.html
+++ b/404.html
@@ -338,6 +338,7 @@
             </div>
 
             <div class="actions">
+                <a class="btn btn-primary" id="add-rider-btn" href="#" hidden>Add to RoadFlare</a>
                 <div class="store-buttons">
                     <a class="btn btn-secondary" id="appstore-btn" href="https://apps.apple.com/us/app/roadflare/id6761305625">App Store</a>
                     <a class="btn btn-secondary" id="playstore-btn" href="#">Google Play</a>
@@ -995,6 +996,15 @@
         }).catch(() => {});
     });
 
+    // Rider deep link: roadflarer:<npub>[?name=...] — handled by a future driver app
+    if (!isDriver) {
+        const riderBtn = document.getElementById('add-rider-btn');
+        const realName = profile.display_name || profile.name || '';
+        const nameParam = realName ? '?name=' + encodeURIComponent(realName) : '';
+        riderBtn.href = 'roadflarer:' + npub + nameParam;
+        riderBtn.hidden = false;
+    }
+
     // Google Play placeholder (Android still in development)
     document.getElementById('playstore-btn').href = '#';
     document.getElementById('playstore-btn').textContent = 'Google Play (coming soon)';