diff --git a/appservice/src/deploy/runWithZipStream.ts b/appservice/src/deploy/runWithZipStream.ts
index 4a34670fbc..77439a3d94 100644
--- a/appservice/src/deploy/runWithZipStream.ts
+++ b/appservice/src/deploy/runWithZipStream.ts
@@ -74,7 +74,7 @@ export async function runWithZipStream(context: IActionContext, options: {
         }
 
         zipFile.end();
-        zipStream = new Readable().wrap(zipFile.outputStream);
+        zipStream = zipFile.outputStream as Readable;
     }
 
     await callback(zipStream);