diff --git a/src/utils/proxy.ts b/src/utils/proxy.ts
index 03949ca2..2fffe2d3 100644
--- a/src/utils/proxy.ts
+++ b/src/utils/proxy.ts
@@ -134,8 +134,10 @@ export async function sendProxy(
   }
 
   // Send as stream
-  for await (const chunk of response.body as any as AsyncIterable<Uint8Array>) {
-    event.node.res.write(chunk);
+  if (response.body) {
+    for await (const chunk of response.body as any as AsyncIterable<Uint8Array>) {
+      event.node.res.write(chunk);
+    }
   }
   return event.node.res.end();
 }