diff --git a/templates/web/src/client.ts.twig b/templates/web/src/client.ts.twig
index 07d67ac77..174810fa1 100644
--- a/templates/web/src/client.ts.twig
+++ b/templates/web/src/client.ts.twig
@@ -544,6 +544,13 @@ class Client {
 
         headers = Object.assign({}, this.headers, headers);
 
+        if (typeof window !== 'undefined' && window.localStorage) {
+            const cookieFallback = window.localStorage.getItem('cookieFallback');
+            if (cookieFallback) {
+                headers['X-Fallback-Cookies'] = cookieFallback;
+            }
+        }
+
         let options: RequestInit = {
             method,
             headers,