diff --git a/app/api/common.ts b/app/api/common.ts
index 089dbf02..65870ee9 100644
--- a/app/api/common.ts
+++ b/app/api/common.ts
@@ -25,6 +25,6 @@ export async function requestOpenai(req: NextRequest) {
     },
     method: req.method,
     body: req.body,
-    duplex: !!req.body,
+    duplex: !!req.body ? "half" : "",
   });
 }