diff --git a/5-network/09-resume-upload/article.md b/5-network/09-resume-upload/article.md
index 7eedc3fbd5..b0aa447d61 100644
--- a/5-network/09-resume-upload/article.md
+++ b/5-network/09-resume-upload/article.md
@@ -48,7 +48,7 @@ To resume upload, we need to know *exactly* the number of bytes received by the
 
 3. Then, we can use `Blob` method `slice` to send the file from `startByte`:
     ```js
-    xhr.open("POST", "upload", true);
+    xhr.open("POST", "upload");
 
     // File id, so that the server knows which file we upload
     xhr.setRequestHeader('X-File-Id', fileId);