diff --git a/.changeset/odd-socks-hug.md b/.changeset/odd-socks-hug.md
new file mode 100644
index 000000000..208b04682
--- /dev/null
+++ b/.changeset/odd-socks-hug.md
@@ -0,0 +1,5 @@
+---
+"@solidjs/start": patch
+---
+
+forward all request headers through single flight
diff --git a/packages/start/src/runtime/server-handler.ts b/packages/start/src/runtime/server-handler.ts
index a2c962298..adb5135ab 100644
--- a/packages/start/src/runtime/server-handler.ts
+++ b/packages/start/src/runtime/server-handler.ts
@@ -276,9 +276,8 @@ async function handleSingleFlight(sourceEvent: FetchEvent, result: any): Promise
         new URL(sourceEvent.request.url).origin + import.meta.env.SERVER_BASE_URL
       ).toString();
   }
-  const cookies = sourceEvent.request.headers.get("cookie");
   const event = cloneEvent(sourceEvent) as PageEvent;
-  event.request = new Request(url, cookies ? { headers: { cookie: cookies } } : undefined);
+  event.request = new Request(url, { headers: sourceEvent.request.headers });
   return await provideRequestEvent(event, async () => {
     await createPageEvent(event);
     /* @ts-ignore */